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Balancing Categorical Conventionality in Music

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Abstract

Research on the relationship between categorical unconventionality and popularity has produced mixed results. While many accounts sug- gest that unconventionality is penalized, much sociological theorizing indicates that success comes from a delicate balancing act between con- ventional and unconventional offerings. Using data on the genre self- classifications of over 2 million musicians and bands across the United States, the authors find broad support for this balancing act. Yet the shape it takes is also conditioned on local contexts, across both high-order complexes of musical genres and geographic space. The authors high- light the local metropolitan area characteristics that shift the relationship between unconventionality and popularity. They also create a typology of cities based on how their unconventional offerings are rewarded and punished. An online visualization tool enables further investigation of these relationships. The authors close by proposing an agenda for how to study local heterogeneity in the relationship between unconventionality and popularity.
Balancing Categorical Conventionality in Music
1
Daniel Silver and Clayton Childress
University of Toronto
Monica Lee
Facebook
Adam Slez
University of Virginia
Fabio Dias
University of Toronto
Research on the relationship between categorical unconventionality
and popularity has produced mixed results. While many accounts sug-
gest that unconventionality is penalized, much sociological theorizing
indicates that success comes from a delicate balancing act between con-
ventional and unconventional offerings. Using data on the genre self-
classications of over 2 million musicians and bands across the United
States, the authors nd broad support for this balancing act. Yet the
shape it takes is also conditioned on local contexts, across both high-order
complexes of musical genres and geographic space. The authors high-
light the local metropolitan area characteristics that shift the relationship
between unconventionality and popularity. They also create a typology
of cities based on how their unconventional offerings are rewarded and
punished. An online visualization tool enables further investigation of
these relationships. The authors close by proposing an agenda for how
to study local heterogeneity in the relationship between unconvention-
ality and popularity.
In 2007, before being nominated for six Grammy Awards and rising to inter-
national stardom, Janelle Monáe was a weirdo. In fact, in our data on over
1
Silver and Childress are coequal rst authors. For helpful feedback on this work, the au-
thors thankAndre Boutyline, ChadBorkenhagen, the Gangof Seven (Anne Bowers, Laura
Doering, Christopher Liu, Sida Liu, Kim Pernell, András Tilcsik), Peter McMahan, Craig
Rawlings, and Vaughn Schmutz. Prior versions of this work were presented at the 2017
American Sociological Association Annual Meeting and the 2018 Social Science History
Association Annual Meeting. All mistakes are our own. Direct correspondence to Daniel
Silver, Department of Sociology, University of Toronto Scarborough, 1265 Military Trail,
Scarborough, Ontario M1C 1A4, Canada. Email: dan.silver@utoronto.ca
© 2022 The University of Chicago. All rights reserved. Published by The University of
Chicago Press. https://doi.org/10.1086/719937
224 AJS Volume 128 Number 1 (July 2022): 224286
2 million musicians and bands working at that time, when measured by the
techniques described below, the combination of genres Monáe used to de-
scribe herself were in the 99th percentile for unconventionality. While Monáes
unconventionality was already on full displayat the time she was in the mid-
dle of releasing a three-part concept album about a messianic androidless
well known was her history as a weirdo coming up in the Kansas City scene
and the room for experimentation that it gave her. As Monáe later explained
of her band in Kansas City, The Weirdos, beingapartof[TheWeirdos]
and touring with them around Kansas City helped me to discover my inner
weirdo, if you will(Gross and Hart 2013). Monáe here draws a close connec-
tion between categorical conventionality, success,and the local context. This
article develops concepts and methods for examining these interrelation-
ships more generally.
Research on the relationship between categorical unconventionality and
popularity oftenalthough not alwaysnds that individuals, organizations,
and products are penalized, punished, and discounted for breaking from the
norm (Zuckerman 1999; Negro, Koçak, and Hsu 2010; Durand, Granqvist,
and Tyllström 2017). Yet an emergent and ongoing question in the categories
literature that is also exemplied by Monáes rise to stardom is howgiven
a strong categorical imperativeinnovation actually occurs (Romanelli 1991;
Clemens and Cook 1999; Pontikes 2012; Pontikes and Hannan 2014; Sgourev
and Althuizen 2014). As noted by Zuckerman (2017, p. 61), an emphasis on
penalization for categorical norm violation may have diverted the literature
from appreciating the factors that provide relief from the categorical imper-
ative, making innovation possible.
Relying on a data set of over 2 million musicians and bands, we investi-
gate how the relationship between categorical unconventionality and popu-
larity shifts, depending on the geographic and relational context in which a
band operates. To do so, we rst discuss the categories literature, highlight-
ing contrasting ndings on the return in popularity for categorical uncon-
ventionality. We then assemble a wide swath of social theorizing that sug-
gests an inverted U shape in the relationship between unconventionality
and popularity. This proposed relationship between conventionality and
popularity has been theorized in the sociological literature for well over a
century and dates back even farther in Western philosophy. For example,
Nietzsche attributes the success of artists, poets, and writers to their ability
to balance conventionality and unconventionality, a creative process that he
refers to as dancing in chains(1986, p. 343). In this view, unconventional
category blending tends to be rewarded up to a point, beyond which increas-
ing unconventionality becomes a liability.
Testing this hypothesis is the rst goal of this article, and we nd strong
evidence for it across multiple musical domains and hundreds of metropolitan
areas. Yet beyond the generally inverted U-nessof this shape, potential
Categorical Conventionality in Music
225
heterogeneity in its form has not drawn as much theoretical attention. As a
second major goal of the article, rather than controlling away this potential
heterogeneity in form in search of a singular average effect, we investigate it.
First, we generate a theoretical graph illustrating different shapes the rela-
tionship between unconventionality and popularity may take. Exploiting
the potential of big data, we then take a forensic social scienceapproach
(Goldberg 2015; McFarland, Lewis, and Goldberg 2016; see also Vaughn
2014) to learn from our data in a structured yet open-ended way. After estab-
lishing that the universe of bands in our data is structured into multiple
musical worldsthat we term rock,”“hip-hop,and niche,we show that
while the basic inverted U shape occurs within those worlds, the relationship
between unconventionality and popularity differs between them. Whereas
bands in the niche world are more harshly penalized for being conventional
than are bands in other worlds, bands in the hip-hop world operate along a
wider range of conventionality, not only with less penalty but also, unlike
bands in the other worlds, even seeing a second uptick in popularity for be-
ing more unconventional. Scaling down to the geographic level, we then gen-
erate a typology of cities (normalists,”“traditionalists,”“experimentalists,
and specialists) based on the relationship between unconventionality and
popularity for bands from them. More generally, we nd that bands from
metropolitan areas with features like higher population density, record indus-
try concentration, and younger residents are more rewarded for more uncon-
ventional musical offerings. We also provide open-access, interactive visual-
ization tools by which others can extend our observations in potentially novel
directions, more fully investigating the micro- and mesolevel mechanisms at
work in rewarding and penalizing unconventionality. In this spirit, the dis-
cussion proposes an agenda for how to study the relationship between uncon-
ventionality and popularity while still allowing for heterogeneity in local con-
texts, highlighting Nashville and Honolulu as representative of what may
be more general phenomena. We close the article with two examples of how
our approach can be readily imported into other research domains beyond
music, before discussing the contributions of our work to research on catego-
ries, cultural sociology, urban studies, big data, and forensic social science
more generally.
IS IT BETTER TO FIT IN, STAND OUT, OR BOTH?
Conventions are the artistic means acquired for the understanding of the hearer;
the common speech, learnt with much toil, whereby the artist can really com-
municate his ideas. ...What the artist devises beyond convention he offers
of his own free will and takes a risk, his success at best resulting in the setting-
up of a new convention. As a rule originality is marveled at, sometimes even
American Journal of Sociology
226
worshipped, but seldom understood. (Friedrich Nietzsche, Human All Too
Human, aphorism 122)
As summarized by Pontikes (2012, pp. 8182), a consensus is building that
organizations with multiple market identities are ...less likely to be success-
ful ...than more focused competitors.Oftenalthough not alwaysreferred
to as the categorical imperative(Zuckerman 1999), empirical evidence of a
penalty for unconventionality has been found across a wide swath of mar-
kets, including those for securities (Zuckerman 1999), online lending (Leung
and Sharkey 2013), Hollywood lms (Hsu 2006), technology (Carroll et al.
2010), and wines (Negro, Hannan, and Rao 2010). As this line of research
has been summarized by Kovács and Hannan (2010, p. 176), for producers
the threat of external punishment ...presents a signicant barrier to par-
ticipation in multiple categories.
Although most scholarship has focused on the disciplinary mechanism of
clear categorization, the literature is much less settled on this question than
it may initially appear (Schneiberg and Berk 2010; Zuckerman 2017). As
Keuschnigg and Wimmer (2017, p. 449) put it, the negative effects [from cat-
egory spanning] are far from universal.Indeed, under the right conditions
there is no penalty for category mixing for law rms (Phillips, Turco, and
Zuckerman 2013) or diversication across industries (Baker 1992; Campa
and Kedia 2002; Ruef and Patterson 2009), and category blending can bere-
warded in venture capital markets (Navis and Glynn 2011; Pontikes 2012; Wry
and Lounsbury 2013), for law and technology rms (Fleming 2001; Paolella and
Durand 2016), and for elite artists (Sgourev and Althuizen 2014) and estab-
lished actors and musicians (Zuckerman et al. 2003; Lena and Pachucki 2013;
Johnson 2017; van Venrooij and Schmutz 2018). Considering these mixed
ndings, Pontikes and Hannan (2014, p. 312) summarize the underlying ten-
sionin the literature as one in which social structures are simultaneously
rigid enough to induce widespread conformity and malleable enough to
change as a result of nonconformist behavior.
Yet rather than viewing producers and products as facing a single categor-
ical imperative of varying directions and strengths, for over a century, schol-
ars across different theoretical paradigms have argued for the need to balance
between conventionality and unconventionality in market presentation. No-
tably, while this suggestion can be observed at an industry level (Peterson and
Berger 1975; Lopes 1992; Dowd 2004), organizational level (e.g., Mears 2011;
Childress 2017; Zhao et al. 2017), the level of individuals (e.g., Becker 1982;
Accominotti 2009; Goldberg et al. 2016; Wohl 2019), or the level of discrete
cultural objects such as songs (de Laat 2014; Askin and Mauskapf 2017), if
there is an imperative, the imperative is in understanding trade-offs and
nding the right mix of conventionality and unconventionality in any given
Categorical Conventionality in Music
227
context. As Simmel (1957, p. 542) wrote more generally of fashion, a com-
promisemust be struck between adaptation to society [i.e., conventionality]
and individual departure from its demands [i.e., unconventionality].This
general idea has also been referred to as a balance between innovation and
conformity(Alston 1989, p. 153), a trade-off between the emancipating as-
pects of entrepreneuring and the accommodation of constraints(Rindova,
Barry, and Ketchen 2009, p. 483), and an offsetting between universal isomor-
phism and distinctive enumeration(Negro et al. 2010, p.18). As Zuckerman
(2017, p. 35) summarizes it, differentiation imperatives stand in fundamen-
tal tension with the categorical imperative,as candidates must distinguish
their offerings from others but not have their offerings screened out forbeing
outside the conventional differentiation.
For Bourdieu (1993, p. 123), this balancing act is expressed as a combina-
tion of tradition and tempered innovation,whereas for White and White
(1993, p. 10) entrants are assessed both in terms of known standards and
in terms of originality,and for Roy and Dowd (2010, p. 192) producers must
nd space somewhere in between in a shifting mixture of precedence and
uniqueness.In social psychologyand work on categories and markets in-
spired by itthesamebasicprincipleisreferredtoasoptimal distinctive-
ness,which is expressed through an inverted U-shaped relationship between
unconventionality and market success: unconventionality is rewarded up to a
point, but when offerings become too unusual their popularity fades (Brewer
1991; Askin and Mauskapf 2017; see Zhao et al. [2017] for review). As such, in
this type of strategic balance(Deephouse 1999), products must be legiti-
mately distinctive(Navis and Glynn 2011) without being too distinctive, such
as Uzzi et al. (2013, p. 468) nd for highly conventional articles containing in-
trusion[s] of unusual combinationsand Lena and Pachucki (2013) nd for
sampling choices in rap songs. Taken together, this disparate theorizing leads
to our central hypothesis, which, following Nietzsche, we call the dancing in
chains (DIC) hypothesis:
HYPOTHESIS 1.Unconventional category blending will be rewarded up to
a point, beyond which increasing unconventionality will become a liability.
This process produces an inverted U-shaped curve describing the relationship
between unconventionality in category blending and popularity.
Nietzsches evocative phrase offers a useful label to capture an implicit em-
pirical hypothesis embedded in the diverse theorizing reviewed above. Nietz-
sche himself developed the notion of dancing in chainsin rich philosophical
reection on the creative artistic process, emphasizing the temporal process
of balancing freedom and constraints, the weight of old conventions and the
search for new ones, and the seeming paradox of freely choosing to bind one-
self to conventions. We extend the general insight of a dynamic and shift-
ing relationship between dancingand chainsby examining how the rela-
tionship between unconventionality, conventionality, and popularity varies
American Journal of Sociology
228
depending on a bands context. What it means for a band to be unconven-
tional depends on where it sits within the broader musical landscape. To ex-
amine how context operates to dene the meaning of balancing,we fea-
ture two key contexts that plausibly (but not fully) shape the expectations
bands meet: the larger genre complexes and the geographic location with
which they are associated.
BALANCING ACTS AND CONTEXTS
Unlike a clear and consistentcategoricalimperative, a balancing act between
two competing imperatives better allows for the possibility of nonlinear re-
lationships between conventionality and popularity. While a wealth of socio-
logical theorizing across a range of subelds suggests some form of the DIC
hypothesis, beyond a widespread theoretical support for this insight, variation
in its form has remained uninvestigated and untested. This means that with
regard to variation on an inverted U we cannot appeal to a well-articulated
theoretical tradition to generate clear sets of ex ante hypotheses to be tested.
Moreover, empirical investigation of such variations has been hampered by
the fact that modeling them requires complex techniques such as nonlinear
interactions, which can be difcult to interpret andsometimes unreliable out-
side of a big data context.
To meet these challenges, now operating outside of a hypothetico-deductive
framework, we rst develop intuitions about some of the possible forms the
relationship between unconventionality and popularity might take. We do
so in the form of a theoretical gure (Swedberg 2016; Silver 2020), supported
with illustrative examples of the types of settings and contexts in which these
different relationships between unconventionality and popularity could possi-
bly occur. We then consider the potential role of two types of contexts in shift-
ing the relationship between unconventionality and popularityrelational,
supralevel complexes of three different musical worlds(Silver, Lee, and
Childress 2016) and metropolitan-level local scenes (Silver and Clark 2016).
These contexts may provide some, but not all, of the plausible sources of var-
iation that we nd. We use these insights to help us better interpret the pat-
terns we inductively discover in our data via various techniques geared toward
revealing how nonlinear relationships between unconventional category pair-
ings and popularity may vary across contexts.
Figure 1 shows nine theoretical relationships between conventionality
and popularity. The X-axis runs from highly conventional combinations of
categories on the left to highly unconventional combinations on the right; the
Y-axis goes from low popularity to high popularity. Our goal in gure 1 is
to be illustrative, not exhaustive, and to illuminate the ways the relationship
between unconventionality and popularity can vary, the point along the spec-
trum of conventionality at which unconventionality becomes a strong liability
Categorical Conventionality in Music
229
could differ, the strength of the penalty could vary, the linearity of the relation-
ship could vary, and more. The rst row shows three simple versions of this
relationship: no relationship, linearly increasing punishments for unconven-
tionality, and linearly increasing rewards for unconventionality. Whereas
scholarship operating in the categories literature has produced ndings in sup-
port of gures 1A1Cor something like them (e.g., Hsu 2006; Pontikes 2012;
Phillips et al. 2013), gure 1D, or something roughly like it in its nonmonotonic
form, is supported by various literatures on balancing between conventionality
and unconventionality (e.g., Simmel 1957; Nietzsche 1986; Brewer 1991). The
inverted U shape in gure 1Ddescribes contexts in which optimal distinctive-
ness predominates: the most and least conventional offerings are penalized,
FIG.1.Nine forms of the relationship between conventionality and popularity. Each
subgraph has the same Y- and X-axes, with low to high popularity on the Yand conven-
tional to unconventional genre combinations on the X. Variations on themes in the sub-
graphs can be read across the rows.
American Journal of Sociology
230
and an inection point exists at the midpoint, in which the conventionally
unconventionalreceive the most market attention.
The heterogeneous ndings discussed above suggest considering possible
contextual variations on the basic form of a nonlinear relationship between
conventionality and popularity. For this reason, gures 1E1Ipresent differ-
ent variants on the basic principle of a balancing actand the rewards or pen-
alties for where one falls within it. Figure 1Ethe inverse of gure 1Dis a
scenario in which extreme conventionality and unconventionality are strongly
rewarded, while offerings that balance the two are penalized. Something like
a U shape has been observed in the industry for video game platforms (Cen-
namo and Santalo 2013) and may also be found in the bifurcated market for
fashion models in New York as described by Mears (2011), in which one side
of the market rewards conventional attractiveness (i.e., conventionality),
whereas the other rewards edginess(i.e., unconventionality), with perhaps
a discounting for falling in between. Figure1F, which we term an optimized
plateaumodel, is a variation on the theme of optimal distinctiveness: a
wider range of unconventionality is rewarded equally, withouta perfect bal-
ance that creates a clear peak. For example, think of the world of big budget
blockbuster movies, which since their emergence in the 1970s and 1980s have
so regularly genre blended across action, drama, comedy, romance, thriller,
and so on, that it is more noteworthy when they do not do so. Even among
the more limited subset of big budget superhero movies, unconventional-
ity of genre combinations can widely range, extending without penalty from
the perhaps more conventional blending of war lm and political thriller in
Captain America: Winter Soldier to the perhaps less conventional blending
of space opera and comedy in Guardians of the Galaxy. Yet an openness to
genre blending in the world of blockbuster lmsislesscommonintheworld
of Oscar-bait movieswhich are almost exclusively intimate dramas and
tend to be highly conventional biopics and period pieces (Rossman and Schilke
2014)as well as more niche worlds of lm, like low-budget genre lms such as
horror movies in which, as with romance novels (Radway 1984), breaking
from convention at all may be sharply penalized. As these examples suggest,
even within a single cultural domain (i.e., movies), norms about what is and
is not conventional may differ depending on what part of the domain one is
examining.
Finally, the third row presents three more nonsymmetrical forms of non-
linear relationships between popularity and conventionality. In gure 1G,
which we title recombinative tolerance,extremely conventional offerings are
penalized, whereas moderately and extremely unconventional combinations
are equally privileged. Focusing on geographic differences, this type of curve
might be found in the 2010s stand-up comedy scene in Brooklyn, which is cel-
ebrated for category blending across different types of stage performance. As
Categorical Conventionality in Music
231
New York Magazine cultural critic E. Alex Jung (2018) explains, Brooklyn-
style comedy isnt just inuenced by stand-up, but also drag, cabaret, bur-
lesque, experimental theater, viral videos, and variety shows. ...[It is] an
amalgam of performance art, skit, musical, and storytelling.In this ex-
ample, place identity in part comes to inect the shape of the relationship
between conventionality and success such that the scene in Brooklyn is gener-
ally a better home for, generates more, and is more widely known for unconven-
tional stand-up comedy than is, for example, Dallas. A further extension of this
idea would be an eclectic imperative(g. 1C) in which increasing unconven-
tionality is increasingly rewarded. This type of relationship could perhaps be
found in Zurich, Switzerland, in the 1920s during the early formation of the
anti-art artistic movement. Figure 1H,recombinative intolerance,is the in-
verse of gure 1Gand represents a context in which conventional and rela-
tively typical recombinations are privileged, whereas more abstruse recom-
binations are harshly penalized; it is a variant on the categorical imperative
that is sensitive to some degree of a balancing act. This could be found in the
focus on authentic ity and not breaking too far from t he norm in blues perfor-
mance expected of Chica go bands (Grazian 2005). Finally, we term gur e 1I
adual innovationmodel. In this framework, extreme conventionality and
most unconventional combinations are punished, whereas less unusual re-
combinations are privileged. Yet the most atypical offerings also attract in-
creased popularity compared to their slightly less atypical brethren. This
would be a world or scene that follows an optimal distinctiveness model but
also contains experimental trailblazers who receive their own, if lesser, re-
wards; think of a market for ne art in which the most rewarded artists bal-
ance conventionality and unconventionality but that also containsan avant-
garde at the fringes of what is acceptably art who are rewarded more than
other unconventional artists (Rawlings 2001). This can be considered one
variation on markets that contain what Zhao et al. (2017) call multiple con-
vergence points in which, rather than a single inverted U shape, there may
be multiple peaks and valleys for popularity across the full range of conven-
tional and unconventional offerings.
Rather than being exhaustive, the examples from gure 1 are intended to be
illustrative of the types of relationships between unconventionality and popu-
larity that could exist in any given context. Our goal in illustrating these pos-
sibilities is not to delimit the consideration set of relationships that may exist
but rather to expand it, given that extant theories can sometimes act as blind-
ersthat do not allow for serendipitous ndings or unexpected discoveries
(McFarland et al. 2016, p. 30). In that vein, we imagine that the forms of the
relationships we outline in gure 1 may vary, just as the examples we use
to illustrate those forms may vary, such that one can imagine different re-
lationships based on different audiences (e.g., Pontikes 2012), creators in
American Journal of Sociology
232
different relational positions within the same overall domain (Bourdieu
1993), and creators from different geographic locales with their own repu-
tations for what typically comes from different places and what is locally typ-
ically done there (e.g., Bennett 2000; Leschziner 2007; Phillips 2011; Hoppe
2020). The central task implied by gure 1, then, is to uncover how the balanc-
ing act between unconventionality and conventionality varies given specic
contexts.
Guided by Griswold (2014, p. 142), we think of bands as existing in com-
munities that may be dened both relationally (i.e., through similarity and
dissimilarity in relational webs of association) and spatially (i.e., geograph-
ically, or something we can locate on a map). Notably, Zhao et al. (2017)
similarly observe that variation on inverted U shapes may be found both
(1) based on psychographic market contexts and (2) geographically. Follow-
ing this logic, rst, balancing between conventionality and unconventional-
ity may take different forms within different relationally dened supralevel
musical worlds. Given that from a sociological perspective (unlike a musico-
logical perspective) genres are community based rather than purely sonically
based (Lena 2012), we would expect these different communities to have dif-
ferent established conventions (Becker 1982; Crossley and Bottero 2015), par-
ticularly as it relates to what is and is not conventional. Put another way, just
as producersframes of reference are relationally dened from the position of
their niches (White 2002), we might expect that bands working in the world of
hip-hop genres may have an orientation to both unconventionality and pop-
ularity different from bands in the rock world (and related genres), who may
have their own norms and denitions.
Similarly, we expect that bands from different urban contexts could, at the
margins, be held to different standards depending on the meanings connected
to the type of cultural scenes (Silver and Clark 2016) associated with their cit-
ies. In various contexts, place-based cultural identities have been shown to
shape how both locals and nonlocals evaluate people and events associated
with a given place (Molotch, Freudenburg, and Paulsen 2000), from poten-
tial tourists applying different stereotypes to Vermont and New Hampshire
based on their local reputations (Kaufman and Kaliner 2011) to tech workers
considering a move to San Francisco rather than Los Angeles partly on the
basis of the formers bohemian countercultural reputation (Storper et al.
2015). These general place associations extend to music as well, and schol-
ars of popular music have closely examined the degree to which musicians
are stamped by the expectations and conventions of the local scenes with
which they are associated (Bennett 2017). Different metropolitan-level scenes
have different reputations not only for different styles of music (e.g., grunge
from Seattle or hyphy from Oakland) but also for being more traditional or
avant-garde in their orientations (e.g., Athens, Georgia, as a hotbed of musical
Categorical Conventionality in Music
233
innovation in the rock world in the early 1980s). A rock band from Cleveland
that experiments with unusual genre combinations runs the risk not only of
being penalized for pushing the boundaries of conventionality for a generic
placeless rock band but also for being too unusual for a Cleveland bandby
contrast, an Athens, Georgia, band may be positively expected to combine
more unusual genres.
Beyond specic cities and their unique identities, types of local contexts
may generate different expectations for bands associated with them. This
is in line with a rich tradition in popular music research and the geography
of music (e.g., Ellis and Beresford 1994; Bennett 2000; Hudson 2006; Phillips
2011; Wynn 2015; Johnson 2017; Mellander et al. 2018). This literature also
points us toward variables to include and explore in the analysis, even if it
does not give clear predictions. For example, dense cities with critical masses
of racially diverse, young, and cosmopolitan residents and subcultures (Fi-
scher 1995) tend to be associated with experimentation and personal self-
expression (Silver and Clark 2016), whereas smaller more homogenous loca-
tions tend to generate relatively stronger expectations of conventionality for
their cultural offerings. Likewise, being from highly educated college towns
(such as Ann Arbor or Madison) may raise expectations for unconventional
musical offerings (Kruse 2010) for some musical styles, while hailing from
marginalized communities and crossroadcities such as New Orleans, Mem-
phis, Detroit, Chicago, and Kansas City (where Janelle Monáe is from) might
do so for others (Florida and Jackson 2010, p. 311). New musical forms have
often emerged in poor and African-American communities, and location in
such settings may be a signal to reward certain forms of experimentation that
might be discouraged elsewhere (Chang 2005; Phillips 2011). Moreover,
while being located in commercial industry cores might encourage confor-
mity (Peterson and Berger (1975), cities with major record industry concen-
trations can also attract large numbers of talented and highly professionally
competent musicians across many genres, leading to increased opportunity
for novel creations, much like the creation and rise of Funk music as de-
scribed in Lena (2012). This is also the case with Nashville, where the country
music industry attracts talented musicians, some of whom then go on to be
celebrated for unconventionally combining the local house styleof country
music with other genres.
Taken together, this literature suggests that the rates of return on uncon-
ventionality should differ across cities on the basis of factors such as record
industry concentration, median household income, racial composition, and
the percentage of college graduates and students (Fischer 1995; Florida
and Jackson 2010; Kruse 2010; Phillips 2011; Silver and Clark 2016). This
also implies that we should be able to classify cities by the form of the
unconventionality-popularity relationship their bands experience, whether
at the extremes of experimentalism or traditionalism across genre worlds, closer
American Journal of Sociology
234
to the norm, or specializing in experimentation in one genre world while re-
maining traditionalist across the others. In terms of the types of curves illus-
trated in gure 1, for bands from experimentalist cities, the punishment for
unconventionality should occur further to the right of the graph, and the fall
from most to least popular should be shorter; by contrast, hailing from tra-
ditionalist cities should generate the opposite pattern (an earlier penalty and
a steeper drop).
Combining the above review and synthesis of multiple literatures, our
analysis pursues two major questions:
Question 1.What is the typical shape of the relationship between con-
ventionality and popularity among musicians and bands? In brief, in accor-
dance with the DIC hypothesis, we would expect to nd variants on the sec-
ond and third rows of gure 1, rather than the linear relationships between
unconventionality and popularity represented in the rst row of gure 1.
We would expect this to be the case both across musical worlds and across
metropolitan-level musical scenes.
Question 2.How does this shape vary across metropolitan areas? The
literature on the role of place in forming the identity and reputation of cul-
tural producers suggests that where bands are from should alter expectations
around how unconventional they can be. This may be based on features of
locales that might be associated with different rates of return on unconven-
tionality, such as their racial and educational composition and their record
industry concentration. And even beyond these types of geographic resources
for bands, it may be based on the presence of different metropolitan-level
musical scenes,such that bands from cities with more experimentalist scenes
are afforded more space for unconventionality before being penalized, whereas
bands from cities with more traditionalist scenes are expected to conform more
strictly to conventional genre combinations.
DATA
We investigate these questions by uncovering patterns in a large data set of
musicians and bands. More specically, our data consist of 2.88 million mu-
sical artists and groups with proles on MySpace.com in January 2007. These
data were originally collected by the University of Chicago Cultural Policy
Center (see Rotheld et al. 2007). At the time of data collection, MySpace
had existed for 4.5 years and was not only the most visited social network in
the United States, but it had also surpassed Google Search and Yahoo Mail
as the most visited website in the United States (Cashmore 2006). In 2007,
industry analysts worried that MySpace had become a natural monopoly
(Keegan 2007), and through an analysis of usersonline behavior before
and after visiting the site, the takeaway was that people are really using
Categorical Conventionality in Music
235
[MySpace] to discover artists and bands(Wray 2007). At the time of data
collection, MySpace was thought of as the de facto home page for the music
industry(Kirkpatrick 2007). Also key to our analysis is that when these data
were collected MySpace wasstill over a year away from incorporating an al-
gorithmic recommendation engine into its platform and had not yet debuted
anewsfeedonto the site, meaning that music listeners on MySpace were
not algorithmically directed toward listening to some bands and not others,
nor was their listenership inuenced through native advertising on the site
(Vincent 2007).
For terminological simplicity we refer to both solo artists and groups on
MySpace as bands.All bands in our data set self-classied their musical
offerings by selecting up to, but not more than, three genre designations from
a standardized list of 121 genres (see table A1 for a full list).Regarding those
genres, as outlined by DiMaggio (1987, p. 441), Literally, a genre is a kind
or typeof art ...[and the] notion of genre presumes that some aggregation
principle enables observers to sort cultural products into categories.The
creation and assignation of genres can be accomplished by communities of
creators (Lena 2012), inuenced through industry interests or conventions
(Negus 2013; Skaggs 2019), or dened by critics (van Venrooij and Schmutz
2018) or audiences (DiMaggio 1987). While cultural sociologists rightly note
heterogeneity in genre assignments (both in where they come from and poten-
tial mismatches in assignment across those assigning), those working in the cat-
egories literature have also relied on category (i.e., genre) assignments across a
wide range of sources, all of which, of course, have their own strengths and
weaknesses. Here we briey touch on three strengths and a potential weakness
of our data on genre assignments.
A strength of our data is that on MySpace the same genres were available
for self-identifying to all bands. Hence, their self-classications occur within
the same categorical system, consisting of the same availabilities and con-
straints, while still allowing for high levels of granularity in self-denition
(Hsu, Hannan, and Koçak 2009). As a result, unconventionality in categor-
ical self-presentation was available to them but not forced on them. With 121
genres afforded and three available slots in which to apply genres to repre-
sent themselves, bands had around 300,000 unique categorical identities avail-
able to them. While additional genres to pick from might provide bands some
greater leeway to express a wider range of genre combinations, the MySpace
platform offered signicant opportunities to both afrm their strong identi-
cation with conventional styles and display themselves in unusual ways.
2
2
While for our question it is only important that bands have a range of conventional and un-
conventional genre combinations available to them (and in our case they have a wide range
with around 300,000 possible combinations available to them), using criticsclassications for
American Journal of Sociology
236
In fact, as discussed below, all bands did not use all available genre slots, nor
were combinations across these genres equally distributed.
A second strength of our data is their size and scope. If we think of bands
in 2007 as an iceberg, the vast majority of bands in our data set would be in
the (vast majority of the) iceberg that is below the surface. This submerged
portion of the iceberg is for the most part entirely ignored by those who
would otherwise be engaging in category assignments (e.g., critics, industry
observers, record labels, or communities of superfans). Simply put, producer
self-classication allows us to investigate millions of the otherwise unclassi-
ed bands that are therefore unobserved in most research. Third, while we
do not know whether audiences agree with our bandsself-denitions, we
know, as we discuss below, that they were exposed to them as a feature of
bandsself-presentations. While there will always be heterogeneity in audi-
ence classication systems (e.g., Pontikes 2012), we know both how bands
use labels to self-present to potential audiences and that those audiences were
exposed to those self-presentations.
The major potential limitation of self-designation is that it can be aspira-
tional (Granqvist, Grodal, and Woolley 2013; Pontikes and Kim 2017) and
possibly not reect true category membership or competency. While still a
concern, this is less of a worry in our data than is often the case. The vast ma-
jority of bands in our database are paidnot in monetary compensation from
consumers but through the psychic goodsof identity as an artist (Menger
1999, p. 556; see also Bourdieu 1993). This remuneration through artistic
identity means that misrepresenting ones artistic identity for perceived stra-
tegic gain is perhaps less common in our data than in data on more humdrum
goods and products; regardless, there is no reason to believe it is a systematic
problem in our data.
On MySpace, self-selected genre designations appeared directly below the
bands name on the top leftof the page (the most prime real estate for left-to-
right languages such as English). These genre designations, should there be
more than one selected, were separated by slashes (e.g., rap/hip-hop/R&B).
Likewise, beneath and to the right of genre designations, the next text pre-
sented to potential listeners is the city and state in which the band is located.
While we cannot be assured that every visitor to every page treated these cat-
egory and city designations as meaningful information, because they were
clearly displayed directly beneath the name of the band on the top left of
the page guarantees that this information was observable, readily available,
and treated as meaningful on the platform. In brief, our analysis of relational
147,000 albums on allmusic.com and without a constraint on the number of genres assigned,
Hannan et al. (2019, p. 122) nd that assigning three genres is modal (58% of all cases) with
only one genre being applied to about 20% of all cases.
Categorical Conventionality in Music
237
musical worlds and geographic musical space mirrors the information that
we know was available to potential listeners of these bands.
Our database also includes for each band its total number of plays, views,
and fans. Unfortunately, additional band-level information is not available,
although future research would benet from incorporating such information.
After several transformations from these raw data, which we discuss below,
we merge the data set with data from the U.S. census and County Business
Patterns (CBP). These metropolitan-level variables allow us to investigate
how the relationship between unconventionality and popularity shifts across
urban contexts.
ANALYTIC STRATEGY
The various subgraphs in gure 1 illustrate scenarios in which the relation-
ship between (un)conventionality and popularity takes on different shapes,
which in turn indicate diverse modes of rewarding categorical conventions
in the form of popularity. Our analytic strategy exploits opportunities within
our data set to observe this relationship within and across different contexts.
We examine two major spaces in which bands operate: (1) the relational struc-
turalspaceofmusicalworldsand(2)the physical geographic space of metro-
politan areas. Our analysis inductively traces the relationship between bands
popularity and the conventionality of their genre choices across these contexts,
with an eye to ways in which the resultant curves approximate the theoretical
constructs in gure 1, as well as other relationships that emerge in the data.
After describing how we measure popularity, we discuss our procedures for
investigating these two contexts in order.
Dening Popularity
During the time of data collection, MySpace did not have a mechanism for the
purchase or sale of music. Instead, our outcome variable is a construct of three
indicators of popularity: total number of views, total number of fans, and total
number of plays in the embedded music player on each bands page. These
measures are highly correlated, with a Cronbachs alpha of .91, well above
the standard .7 threshold for construct validity. To combine these threevar-
iables into a single construct, we take natural logarithms of each component
variable (views, plays, and fans) to normalize their distributions (which are
highly skewed), calculate a Z-score for each, and then add them. This helps
ensure that components are given equal weight in the popularity score de-
spite their differences in numerical magnitude (i.e., bands will get many
more page views than people signing on as fans).
Table 1 shows the mean, median, and standard deviation for plays, views,
and fans. Figure 2 shows plays, views, and fans across the three worlds (derived
American Journal of Sociology
238
according to methods described below). On average bands in the rock world
are more popular than bands in the hip-hop world, which are slightly more
popular than bands in the niche world. The large disparity between the
means and medians indicates that, as is generally true in markets for cultural
goods, a relatively small number of bands are extremely popular, while most
are not. For example, the median band has three fans and 120 plays.
3
As music in 2007 was not available for sale on or through MySpace, like
Salganik, Dodds, and Watts (2006) we are able to measure a relatively pure
form of popularity that is not conditioned on factors like pricing, variation in
disposable entertainment income, or the possible prevalence of piracy over
purchasing in some worlds more than others. Likewise, in 2007 MySpace
was an unmediated market (Hirsch 1972), allowing for direct interaction be-
tween bands and potential fans of their music without any sorting, segregat-
ing, evaluations, or coverage mismatch(Zuckerman 1999) from third-party
intermediaries or some third-party intermediaries over others (Dowd et al.
2021).
4
Deriving Three Musical Worlds: Rock, Hip-Hop, and Niche
We create a large and complex genre network by mapping the band-provided
(self-identied) colistings of (up to three) genres. Genres are considered related
when a band lists them together. For the full population of bands that listed
more than one genre designation, greedy modularity optimization is employed
to identify genre communities. These procedures resulted in three higher-
orde r genre complexes, which we term worlds: rock, hip-hop, and niche, which
are made up of 16 lower-order genre communities. These genre worlds are
3
As a robustness check, we ran our regression models with a dummy variable for bands
with the lowest popularity score, which did not alter our ndings.
4
While we believe ours is a purermeasure of popularity than sales for the above-stated
reasons, in a supplementary analysis of the top 150 bands on MySpace (available on re-
quest) popularity does track well with sales.
TABLE 1
Mean, Median, and Standard Deviation for Plays, Views, and Fans
Plays Views Fans
Mean . . . . . . . . . . . . . 3,788 2,137 222
Median . . . . . . . . . . . 120 125 3
SD . . . . . . . . . . . . . . . 147,595 67,886 3,582
NOTE.Data are across all MySpace bands. Large SDs indicate that while
the preponderance of bands have relatively few plays, views, and fans, popular-
ity is spread across a great range of values including smaller numbers of very
popular bands.
Categorical Conventionality in Music
239
FIG.2.Popularity varies by musical world. Mean values and 95% condence intervals for three popularity metrics (plays, views, fans) within
three musical worlds (rock, hip-hop, and niche). Given the size of the data set, condence intervals are extremely narrow. Rock musicians are con-
sistently more popular, on average.
robust across multiple network-based community detection algorithms.
5
They
result from the fact that musicians are more likely to pair some genres together
than others. Genres are not isolated units combined haphazardly but are an-
chored in higher-order musical groupingsislands of musical inbreeding,
each of which is structurally distinct from the next, mixing more within their
boundaries than between. The hip-hop world includes genres such as rap,
R&B, and crunk; rock includes genres like metal, alternative, and punk; and
niche includes genres like electronica, experimental, and Hawaiian. More
details regarding these procedures and the rationales for them are available
in appendix D and Silver et al. (2016).
To be clear, the construction of these worlds does not drive the overall in-
verted U shapes we document below. Rather it allows us to investigate whether
within the basic framework of an inverted U shape we see different patterns
across worlds in the relationship between popularity and unconventionality,
just as we subsequently investigate whether our results differ by geographic
place. The conceptualization of multiple musical worlds as dened by genres
within the broader universe of music making is not foreign to sociologists
of music, who emphasize that in music there are multiple genre worlds
(Frith 1998), musical worlds(Crossley and Bottero 2015), and music cul-
tures(Negus 2013) that are simultaneously operating according to different
conventions, evaluations, norms, or standard practices. Yet our interest in
whether the worlds of rock,hip-hop, and niche genres may substantively dif-
fer from one another when it comes to the relationship between unconven-
tionality and popularity is not solely derived from a broader acknowledgment
that music is organized by genres or that those families of genres come with
different communities and conventions (which is true across genres and
supralevel families of genres across all creative goods). Rather, in addition
to being relationally derived through webs of association (Griswold 2014,
p. 142), our three worlds empirically differ in ways that would reasonably play
a role in our central question on the relationship between popularity and
unconventionality.
Most importantly for the question of the relationship between popularity
and conventionality, the baseline level of popularity in the rock, hip-hop,
5
Our analysis showed that the clustering produced by greedy modularity optimization
was robust across algorithms. In comparing clusterings from the greedy modularity op-
timization algorithm to alternatives, similarities are in the range of 93% (walktrap com-
munity detection) to 96% (multilevel modularity optimization). The (small) differences
tended to revolve around the relative size of clusters, with alternatives producing less bal-
ance. For instance, alternatives might place a few genres into the larger niche cluster that
greedy optimization placed into the hip-hop cluster. Despite the fact that multiple algo-
rithms would generate similar clusters, we chose greedy modularity optimization in part
because it is the most computationally efcient and also because its logic reects in a
straightforward way our intention to nd densely interconnected areas of the genre net-
work (discussed further in Silver et al. 2016).
Categorical Conventionality in Music
241
and niche worlds empirically differs, as do each worlds baseline character-
istics of genre blending. Overall, as gure 2 shows, bands in the rock world
are on average the most popular, whereas bands in niche world are the least.
Likewise, these worlds have different degrees of internal differentiation: our
community detection algorithm found no subcommunities in the hip-hop
world and no musical core around which other genres operate in the niche
world (see app. D). The worlds also have different levels of permeability at
their boundaries: while bands in the niche world still inbreed with other
niche world genres more than they crossbreed into genres in other worlds,
they do extend out to other worlds in their genre combinations more than do
bands in the rock and hip-hop worlds (Silver et al. 2016). Given that these
worlds differ both for overall popularity and for genre blending within and
between them, we would, in fact, be somewhat surprised if there was not
variation in how the relationship between popularity and conventionality
operates across these worlds.
A reasonable question concerns the substantive meaningfulness of the
niche world, which contains genres that are more sonically heterogeneous
than those in the rock or hip-hop worlds, as well as including more regional
specialty genres such as Spanish pop,”“regional Mexicanand J-pop.De-
spite this internal heterogeneity, these niche genres in our view still consti-
tute a world in our sense of the term (1) because bands more frequently blend
genres within the niche world than into either of the other worlds and (2) be-
cause the genres in the niche world occupy the same structural position in
relation to the two dominant worlds of popular music: rock and hip-hop.
In fact, the logic of structural equivalence (Burt 1976; White, Boorman,
and Breiger 1976) is central to the types of relational measures we employ
in constructing these worlds and is particularly important if the structural
equivalence of entities may be capturing some of the variation in onesre-
search question.
6
In our case, bands in the niche world are structurally equiv-
alent not only in how they combine genres in relation to the rock and hip-hop
worlds but also with regard to their relationship to popularity. Simply put,
because in 2007 rock and hip-hop were the two major worlds around which
popular music orbited, by working in niche genres, bands were creating ceil-
ings on how popular they could become (e.g., regional Mexican bands are rea-
sonably doing something that is not oriented around trying to make it onto
the Billboard Top 100). This is to say that if one is interested in the relation-
ship between genre combinations and popularity, a world of bands that are
6
It is worth noting that the point of structural equivalence is tosee beyond the types of cat-
egorical groupings that are more readily apparent. Recalling Mohr (1994) on 19th-century
welfare relief, unwed mothers and returning soldiers were the structurally equivalent de-
serving poorin relation to tramps, despite unwed mothers never also being returning sol-
diers and vice versa.
American Journal of Sociology
242
structurally equivalent in their relationship to unconventionality in genre com-
binations and who also have opted to work in comparatively less popular
genres is substantivelymeaningful for our research question on both counts.
Nevertheless, we reiterate that we do not enforce meaningfulness in our mea-
sures on the niche world in relation to the other two worlds but rather allow
for meaningfulness to be observable should it exist.
Dening Genre Conventionality
In the categories literature, categorical typicality is most often treated linearly
through count data, in which each additional category assigned correlates
with a one-unit increase in categorical complexity (Hsu et al. 2009; Kovács
and Hannan 2010; Pontikes 2012). While this measure is elegant in its sim-
plicity, it elides research on classication systems in which conceptual dis-
tances between categories are not equal. For instance, a count data approach
would treat the blending of black metaland death metalas equivalent to
the blending of death metaland opera.Following recent developments in
this stream of research (e.g. Kovács and Hannan 2015; Wry and Castor 2017;
van Venrooij and Schmutz 2018), we therefore treat musical genres as rela-
tionally positioned to one another: those genres that regularly co-occur are
closer and more conventional (e.g., black metal and death metal), whereas
those that do not (e.g., death metal and opera) are more distant and uncon-
ventional (Church and Hanks 1990; Mohr 1998; Gärdenfors 2004; Pachucki
and Breiger 2010). While a relational approach to classicatory systems is far
from novel (Bourdieu 1993; Mark 1998; Ruef 2000; Ruefand Patterson 2009),
it is, we believe, too irregularly applied to work on category blending.
To this end we adapt Lizardos (2014) measure to our case and data. In this
measure, genres that are routinely connected to one another are considered
more conventional, while more unusual combinations count as more uncon-
ventional. Technical details about how we construct the measure are in ap-
pendix B.
7
The resulting unconventionality measure ranges from 0 to 1, with
values closer to 1 indicating a band with a more unconventional set of genre
7
Lizardos (2014) measure was developed to quantify unconventional genre preferences
in consumers. However, the measure itself is neutral with respect to its object, as are other
plausible metrics such as species of the broader family of Jaccard-style distance metrics,
variants of which have also appeared in the categories literature (e.g., Kovács and
Hannan 2015). Accordingly we compared results based on our min-clustering approach
with a standard Jaccard measure and Kovács and Hannans (2015). In all cases the in-
verted U appears, and the results of the multilevel regression models are nearly identical.
However, for both the standard Jaccard and Kovács and Hannans (2015) variation, un-
conventionality is compressed toward the right side of the distribution due to Jaccard-
based measurescollapsing disparity in size between genres with the unconventionality
of the pairing of those genres. Our approach allows us a direct path to our research inter-
est about the combining of genres in atypical ways.
Categorical Conventionality in Music
243
combinations. The most categorically conventional bands in our data, which
have an unconventionality score of 0, self-present as fully committed to a
single genre by either listing it multiple times across each available genre slot
(e.g., death metal/death metal/death metal) or only listing one genre (e.g.,
jazz/[blank]/[blank])these are indications of conforming to clear categorical
conventions.
8
Scores in the middle range from .3 to .7 tend to include fairly
familiar genre combinations, such as metal/thrash/death metal (rock world),
pop/R&B/hip-hop (hip-hop world), techno/trance/turntablism (niche world).
These are the types of conventionally unconventional genre pairings we would
expect toward the middle of the distribution: they are not the entirely conven-
tional genre purists who set the baseline (e.g., punk/punk/punk), nor are they
the highly unconventional weirdos who appear at the high values. Those very
unconventional genre combinations become extremely unusual above around
.9, including self-presentations such as electro/surf/powerpop and crunk/indie/
techno (rock world), ambient/death metal/hyphy and club/afrobeat/ska (hip-
hop world), and Christian rap/jungle/thrash and dub/house/thrash (niche world).
To return to our opening example, in our data Janelle Monáes genre com-
binations placed her in the 99th percentile of rock world unconventionality.
Linking Bands to Cities
Given the linkages suggested by the literature between various place charac-
ter and musical conventions, we locate bands in metropolitan areas and ex-
amine the extent to which the general relationship between conventionality
and popularity shifts, depending on the city a bandis associated with. To as-
sign bands to geographic areas, we exploit the fact that bands could list their
city and state on their MySpace prole. While in most cases thiswas straight-
forward, in some cases bands did not enter a city or state or entered terms that
could not be interpreted as a city or state except on a case-by-case basis. Of
the approximately 2.5 million band pages that were identied as being in the
United States, we were able to match about 2.2 million to a census-designated
primary metropolitan statistical area (PMSA; for convenience we use the ge-
neric terms MSA, metro, or metro area throughout this text), and thus they
could be included in the geographic analysis.
9
8
Because the number of genres chosen may itself be associated with bandspopularity
(e.g., in that completing all three genre slots is a sign of being more committed to public
self-presentation), we control for this in our regression models.
9
Matching bands to PMSAs required a few different approaches. While the vast major-
ity of bands could be matched to PMSAs after correcting for common errors, typos, and
stylized spellings in their provided city/state information, about 150,000 were matched by
SASs soundex routine based on pronunciation. In addition, city names that had an iden-
tied state and were used 10 or more times were manually investigated and matched to a
metro area when possible.
American Journal of Sociology
244
Although bands are embedded in or have emerged from local metropolitan
scenes, especially since the advent of virtual spaces like MySpace, they also
operate in translocal and virtual scenes (Peterson and Bennett 2004).
10
Like-
wise, the advent of virtual distribution channels like MySpace allowed bands
to reach widespread audiences outside of traditional industry distribution net-
works. Accordingly, our measure of popularity is not strictly locala San
Franciscobased band can and will have plays, views, and fans from else-
where. Nevertheless, wherever they are located, we know that, compared
to today, audiences were much more likely to have at least some knowledge
of the bands they were listening to online. This is because our data exist in a
brief window in which MySpace was the most popular music destination on
the Internet, but before the advent of newsfeeds, algorithmically generated
taste suggestions, promotional advertising on the site to attract more atten-
tion, or even multiartist playlists. Likewise, we know that audiences are ex-
posed to a bands location information on their MySpace page, which can
potentially shift expectations for how much unconventionality is appropriate
for, for example, a rap artist from New York or Los Angeles or a rock musician
from Cleveland or Athens. Analytically, this straightforwardly suggests consid-
ering the impact on popularity of the interaction between the place label asso-
ciated with a band and its unconventionality.
While our data cannot account for fan location or the degree to which a
given band tours and participates actively in virtual spaces, we note that re-
search suggests that even in a digital setting most bandsonline audiences
come from the local milieu out of which they operate (Allington 2014). Given
that the vast majority of MySpace bands have very small followings, we ex-
pect this to be especially the case in our data set. Moreover, to the extent that
the typical MySpace band does reach extralocal audiences, those audiences
would accordingly tend to be highly knowledgeable about the band and the
local scene in which it operates. Overall, the low median popularity indicates
most bands in the MySpace universe are garage bandsoperating within rel-
atively local scenes with little translocal reach.
11
Still, we cannot differentiate
10
In a supplementary analysis for the top 150 bands on MySpace, we investigated their
relationship to the cities they listed on their proles: 74% listed places that they were ei-
ther born or raised in and launched their careers from (e.g., Ice Cube and Los Angeles or
Regina Spektor, whose family moved to New York when she was eight and who came up
through the antifolk scene in New York); 22% listed cities they moved to in young adult-
hood (usually after high school or college) and developed their sound in for a signicant
amount of time before their rst release (e.g., Blake Shelton, who moved to Nashville at
17 and worked and performed in Nashville for nine years before his rst release); and 4%
listed cities they had moved to after their rst release, with this type of infrequent residen-
tial mobility being inversely related to popularity even in the top 150 bands ranked for
popularity (i.e., the top .005% of bands in our data ranked for popularity).
11
Very popular bands by contrast likely have much broader reaches, suggesting that their
location may be less important, although not entirely unimportant: regardless of their location,
Categorical Conventionality in Music
245
between our metropolitan-level effects being somewhat noisybecause of
the existence of some nonlocal fandom or nonlocal fans holding unconven-
tional bands from places with characteristics that might signal or produce
openness to experimentation (or the opposite) to different standards. Never-
theless, as we return to in the discussion, pursuing with suitable data a more
robust analysis of how these multiple spaces operate separately and in inter-
action is an exciting avenue for extending our research.
Metropolitan Variables
Our metro area variables come from three data sources: the U.S. census, CBP
(aggregated to the PMSA level), and our MySpace data (also aggregated). Be-
cause metro boundary denitions changed in 2010 and our PMSA denitions
are from 2000, we use data from the 2000 census. The CBP data are from
2001. Given the highly aggregated character of these data, it is extremely un-
likely that relative differences among metro areas would change substantially
between 2000 and 2007.
The census provides population data that the literature has identied as
dening urban contexts in which various musical styles may be differentially
favored. These population variables include population density, median house-
hold income, education (the percentage of the populationwithacollegedegree),
youth concentrations (the percentage of the population ages 2534), the per-
centage of the population that are college students, and the nonwhite percent-
age of the population. To capture local music industry concentration, CBP
contains information about recording industry establishments and music ex-
hibition and consumption spaces. Specically, we include two indexes. One
is a metro per capita record industry index, which sums four six-digit North
American Industrial Classication System (NAICS) categories: Record
Production,”“Music Publishers,”“Sound Recording Studios,and Other
Sound Recording Industries.The other is a per capita index measuring con-
centrations of music consumption and exhibition opportunities: Musical In-
strument and Supplies Stores,”“Prerecorded Tape, CD, and Record Stores,
Promoters of Entertainment Events with Facility,and Promoters of En-
tertainment Events, without Facility.
12
Finally, we construct a metro-level variable from our MySpace data. This
variable measures the degree to which each metro specializes in a particular
audiences may implicitly or explicitly treat rap bands, e.g., from Los Angeles, Atlanta, or
New York, differently.In line with this insight, we found that restricting our regression anal-
ysis to the top 5% of bands in terms of popularity reduced the explanatory power of metro-
politan variables to some degree.
12
Details about organizations included in NAICS categories may be found at https://
www.census.gov/naics/.
American Journal of Sociology
246
musical world (as dened above). To construct this variable, we calculate an
entropy index (specically, Shannons entropy H) based on the number of bands
in each of the three worlds. Lower values indicate greater specialization.
We use several different techniques to examine how the relationship be-
tween unconventionality and popularity varies by musical world and metro-
politan area. Specic details about these methods are provided in the course
of the analyses.
RESULTS
Testing the Dancing in Chains Hypothesis
We rst examine the relationship between bandsconventionality in genre
recombination and their popularity across musical worlds. Figure 3 visual-
izes generalized additive models (GAMs) showing the relationships between
unconventionality and popularity for all bands across all three musical
worlds.
13
The DIC hypothesis holds. Across all three musical worlds we nd
an inverted U shape. Two-line tests (Simonsohn 2018) conrmed the non-
monotonic, inverted U-shaped function in each musical world.
The inverted U is the predominant shape taken by the relationship be-
tween unconventionality and popularity, strongly conrming our central hy-
pothesis. Yet gure 3 also suggests minor variations on this dominant motif.
Rock and niche worlds largely approximate an optimal distinctivenessmodel
(g. 1D), with rock somewhat resembling the optimized plateau model in
which the range of acceptable unusual combinations is relatively wider, and
the peak is somewhat atter. More specically, rock and niche both exhibit
curves that are slightly skewed to the right. The niche curve starts lower (i.e.,
a stronger penalty for no genre blending at all) than the rock and hip-hop
worlds. In these musical worlds, bands reach an inection point at an un-
conventionality score of around .65 or so, and then they experience sharper
13
As Beck and Jackman (1998) describe, GAMs are especially well suited for cases like
ours in which the shape of the relationship between the independent and dependent var-
iable is an open question. While standard forms of regression allow for the possibility of
nonlinearity, in our case existing research provides little theoretical guidance when it
comes to specifying the appropriate parameterization a priori, as required when using
more conventional techniques. A GAM gets around this problem by allowing the relation-
ship between the independent and dependent variable to vary locally across the range of
the predictor. The smoothness of the resulting curves depends on the value of the user-
dened smoothing parameter k, which can be selected using generalized cross-validation
(Wood 2017). As a robustness check, we experimented with alternative values of kand
found consistent support for the claim that the relationship between unconventionality
and popularity is characterized by an inverted U shape, with the returns on unconvention-
ality tending to fall off at eitherextreme. The visual evidence produced by the GAMs was
subsequently corroborated using more conventional parametric procedures including two-
line tests and quadratic multilevel regression, as discussed below.
Categorical Conventionality in Music
247
FIG.3.Genre conventionality and popularity across three musical worlds: rock, hip-hop, and niche. All three exhibit an inverted U-shaped char-
acteristic of optimal matching. However, the shapes vary, indicating different ways of balancing these imperativ es. Curves are estimated using a GAMin
which the relationship between popularity and unconventionality in a given world is expressed in terms of a penalized cubic regression spline. Penalized
cubic regression splines were implemented using the shrinkage smoother included as part of the mgcv library in R (Wood 2017). The visual evidence
produced by the GAMs is corroborated using more conventional parametric procedures including two-line tests and quadratic multilevel regression.
declines in popularity as theyget more unconventional from there. The types
of genre combinations chosen by relatively popular bands at these inection
points are in general not extremely conventional, nor are they extremely in-
novative. For example, techno/trance and punk/glam combinations are near
the inection point in the niche world, as are rock/alternative/grunge and
thrash/metal/hardcore in the rock world. These are semifamiliar genre com-
binations that stand in between categorical purity on the onehand and more
unconventional recombinations on the other. In these worlds they are the
conventionally unconventional genre pairings that attract fans.
The hip-hop world alsois well described by an inverted U shape, although
it takes a slightly different form. It follows the same pattern as rock and niche
through the rst three-quarters of the range, with the inection point occurring
around a .5 unconventionality scoreearlier than the other worlds. The imper-
ative to convention is somewhat stronger in the hip-hop world, although the
curve is somewhat atter, suggesting that the range of unconventionality that
is rewarded is relatively wider. Bandspopularity peaks at a relatively higher
level of conventionality (e.g., hip-hop/pop/R&B) and diminishes when they
stray into more unconventional territory, such as neo-soul/techno or hyphy/
jazz. At the same time, the punishmentfor such unconventionality is not
as steep as it is in rock and niche, in that the distance between peak and
trough popularity is substantially smaller in the hip-hop world.
The relationship between unconventionality and popularity in the hip-hop
world further complicates at the tail of unconventionality, where it resembles
the dual innovation model envisioned in gure 1I. After the rst major uptick,
a second one appears, where even more unconventional combinations result
in relatively heightened popularity, before, in this case, trailing off again when
their unconventionality becomes too extreme.
14
Examples of genre combina-
tions chosen by relatively popular bands at this second inection point in the
hip-hop world include hyphy/rock/punk and indie/crunk. Popular artists at this
second peak in the hip-hop world in 2007 included Cody ChestnuTT (perhaps
most well known for his collaboration with The Roots on The Seed (2.0),
which was described as a hybrid of distorted rock, hip-hop and psychedelic
soul[Petridis 2002]) and Zilla Rocca (an unconventional rapper who would
go on to later self-identify as making what he called noir-hop).
Popularity and Conventionality Vary by Urban Context
So far, we have demonstrated a strong and consistent inverted U shape across
three musical worlds, which describes a nonlinear process whereby bandspop-
ularity increases as they incorporate more unconventional genre combinations,
14
The right tail of the rock world exhibitsan uptick, where extremely unconventionalgenre
combinations (e.g., psychedelic/death metal/southern rock) tend to increase in popularity.
Categorical Conventionality in Music
249
before hitting an inection point where additional unconventionality reduces
their popularity. We also pointed toward some evidence that this general pattern
comes in somewhat different forms across musical worlds and that the ways
genre recombination is rewarded and punished correspond to scenarios en-
visioned by our theoretical gure. We now move to the metropolitan context.
We examine the extent to which conventionality is rewarded differentially
depending on where bands are in geographic space. To do so we pursue a
two-step strategy. In the rst step, we compare metros by the shapes of their
conventionality-popularity curves across musical worlds. In a second step,
for each genre world we t a multilevel regression model that accounts for
both within and between metro variation in the conventionality-popularity
relationship. These models are designed to highlight variables that shift the
relationship between conventionality and popularity across metros. More de-
tails about both methods are provided below.
Turning to the rst step, we again use GAMs to generate separate curves for
each musical world, this time for each metro separately. This produces three
curves for each metro, with one curve for each musical world. This is illustrated
in gure 4 using the case of San Francisco. We construct similar sets of curves
for all metro areas.
Comparing gure 4 to gure 3, it is striking that the macropattern of the
inverted U recurs in this local context, again conrming the generality of
the DIC hypothesis. Yet gure 4 also indicates that across all three musical
worlds the rate of return onunconventionality for bands located in San Fran-
cisco differs from the typical pattern. Nationally, the inection point for pop-
ularity occurs between about .5 and .65. For San Francisco bands, however,
the inection point occurs between .875 and .925. To be sure, even for bands
from San Francisco extreme unconventionality is eventually penalized, but
this discounting is lessextreme than it ison average. Compared to othermet-
ropolitan locales, across all three musical worlds it pays to be an unconven-
tional bandconnected toSan Franciscos reputation for experimentation and
innovation.
To facilitate comparison and exploration of these types of curves across
metros and musical worlds more generally, we built an online interactive vi-
sualization tool, which also provides more methodological details (see https://
unconventionality.github.io/). Figures 5 and 6 are stylized snapshots of this
tool, but we encourage readers to view the interactive visualization and its
corresponding appendix to better understand how to use the interface and
the methods by which we produced it.
Points are positioned in the central panel to reveal similarities and differences
in the shapes of their corresponding curves. Figure 5 illustrates the overall re-
sults, which again can be explored in more detail at https://unconventionality
.github.io/. In both gure 5 and the online tool, the left panel shows the three
basic patterns describing the conventionality-popularity relationship across
American Journal of Sociology
250
FIG.4.Atypical receptivity to unconventional genre combinations across rock, hip-hop, and niche musical worlds, for the San Francisco PMSA.
Curves are derived from GAMs with cubic splines, with Rs mgcv package. We construct similar curves for all metro areas and compare them.
all metros. Each pattern is present within each metro to varying degrees. Per-
centages that accompany each pattern indicate the contribution of that pattern
to the total shape of all curves across all metros.
Pattern 1 is accordingly the most common factor, contributing about 54%
of the total shape of the curves and representing the basic inverted U of op-
timal distinctiveness in gure 1. Pattern 2 contributes about 30% and ap-
proximates the dual innovation model of gure 1. The distribution of points
on the graph indicates that, independent of metro characteristics, the niche
world tends to resemble pattern 1, the hip-hop world tends to resemble pat-
tern 2, and rock is in the middle, with a somewhat greater tilt toward pattern 1
than pattern 2. This aspect of the decomposition thus corroborates the results
of gure 3, showing that musical worlds constitute the major axes around
which our universe of over 2 million bands turn.
Pattern 3, however, reveals an additional, metropolitan axis of comparison
that cuts across musical worlds. Accounting for about 16% of the popularity-
conventionality curves within metros, this pattern describes the degree to
which unconventionality or conventionality is rewarded for bands from a
FIG.5.Comparing the conventionality-popularity relationship across metro areas and
musical worlds. All metro-musical world combinations are placed into a three-dimensional
space derived from a nonnegative matrix factorization of their local unconventionality-
popularity curves. Metro-world combinations are positioned by how closely they approx-
imate the three patterns on the left. Bubble sizes are proportional to metro population
size. There are three bubbles for each metro and one bubble for each musical world.These
relationships can be exploredin more depth through an online interactive tool accessible at
https://unconventionality.github.io/.
American Journal of Sociology
252
FIG.6.Illustrating normalists, traditionalists, experimentalists, and specialists. Four metro areas highlighted as examples of general types of
metropolitan formations of the conventionality-popularity relationship. These relationships can be explored in more depth through an online in-
teractive tool accessible at https://unconventionality.github.io/.
given metro. Looking at the right panel of gure 5, within each world, there is
a clear distribution of metros ranging from the bottom left of the panel (more
receptive to unconventional genre blending) to the top right (less receptive).
Taken as a whole, gure 5 empirically illustrates the core theoretical intui-
tions behind this study: that, within the basic framework of a balancing act
between conventionality and unconventionality, the relationship between
conventionality and popularity comes in many forms and that the shape
and distribution of those forms track (to varying degrees) the (musical) cat-
egorical context (i.e., genre worlds) and geographical context (i.e., metros).
These methods also allow us to identify metros that occupy distinctive
positions within the space of conventionality-popularity relationships, such
as San Francisco. In the online visualization, hovering over or clicking on a
point in the central panel changes the left panel. The three patterns are
ranked according to their prominence for that metro and musical world.
For example, clicking on New York Citys niche curve shows that pattern 3
contributes about 32% of its shape, more than pattern 2 does (18%). These rel-
ative contributions account for the position of each point in the central panel.
Based on an examination of the positions of metros via the interactive
tool and the relative shares contributed by pattern 3 to their shapes, table 2
presents a typology of four different types of metropolitan areas. Figure 6
adds graphical illustration, while also providing further examples of simi-
larly positioned metropolitan areas in table 2. Bands from normalist metros,
illustrated by St. Louis, Missouri, in the top left of gure 6, have all three of
their points in the middle of the distribution, generally exhibiting a typical
relationship between conventionality and popularity across all genre worlds.
Bands from conventionalist metros, illustrated by Buffalo, New York, in the
top right of gure 6, are rewarded for conventional genre combinations and
punished for unconventional pairings with greater force than are bands from
other cities, across all worlds; for these metros, all three of their points tend to
cluster in the upper right of the diagram. Bands from experimentalist cities,
such as New York in the bottom left of gure 6, are more rewarded for uncon-
ventional combinations across all worlds: all three of their points tend to cluster
in the bottom left of the diagram. Last, bands from specialist cities experience
a sharp contrast across musical worlds, for example, by being less or more
TABLE 2
Typology of Cities
Normalists Traditionalists Experimentalists Specialists
St. Louis, Mo. Buffalo, N.Y. New York, N.Y. Baton Rouge, La.
Dallas, Tex. Gary, Ind. Ann Arbor, Mich. Birmingham, Ala.
Sacramento, Calif. Norfolk, Va. Nashville, Tenn. Miami, Fla.
Dayton, Ohio Vallejo, Calif. San Francisco, Calif. Greenville, N.C.
American Journal of Sociology
254
receptive to eclectic offerings in one world versus the others. For these types
of metros, there are great distances between their threepoints. In the bottom-
right corner of gure 6, this is exemplied by Baton Rouge, Louisiana. Hip-
hop bands from here nd unconventional hip-hop music more rewarded,
whereas for rock and niche bands unconventionality is more rewarded.
Together, gures 5 and 6 show that the shape of the relationship between
conventionality and popularity varies in important ways from one metro-
politan area to the next. We now turn to multilevel regression to investigate
how the shapes of these metro-specic relationships vary as a function of the
characteristics of the metropolitan areas in which a band is located. For
each musical world, we estimate a varying intercept, varying slope model
in which the effects of unconventionality and unconventionality squared
are allowed to vary by a bands metro area, thus producing a unique qua-
dratic curve for each. In addition to controlling for the number of genres se-
lectedrepresented here as an ordered factorand the characteristics of
the metropolitan area, we include a series of cross-level interaction terms
representing the interaction between the unconventionality terms on the
one hand and the metro-level characteristics on the other. Following Gelman
(2008), continuous predictors are standardized to have a mean of 0 and a
standard deviation of 0.5, while dichotomous predictors are centered around
the mean.
The results of the analysis are shown in table 3. For context, we rst note
main effects beyond our focal variable, bandsrelational unconventional-
ity. We nd that for the otherwise average band in any given world, popu-
larity is generally associated with lower population density, higher numbers
of college graduates and young people, lower incomes, and greater special-
ization in distinct musical worlds, all else being equal. The rock world stands
out in the extent to which popularity is associated with concentration of the
local record industry. Similarly, we nd that whereas popularity in the rock
and niche worlds is negatively associated with the size of the nonwhite pop-
ulation, the hip-hop world is unique in the sense that, on average, the racial
composition of the surrounding area has almost no effect on the bands over-
all popularity. Across all three worlds, we nd that bands that choose two or
three genres tend to be more popular than those who choose only one. This
last nding is signicant in that it is a variant of the typical count data ap-
proach that has been used in the categories literature, where choosing more
total genres would indicate greater unconventionality. On this score, wend
that across over 2 million American bands there is more of an eclectic imper-
ative (g. 1C) than a categorical imperative (g. 1B; see also Pontikes 2012;
Johnson 2017).
Keeping this background in mind, we turn to the relationship between un-
conventionality and popularity. As expected, characteristics of a bands city
such as population density, racial composition, median household income,
Categorical Conventionality in Music
255
TABLE 3
Varying Intercept, Varying Slope Models of Unconventionality by Musical World
Predictor
Rock
Popularity
Hip-Hop
Popularity
Niche
Popularity
Unconventionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21.37*** .35*** 21.94***
(.03) (.02) (.05)
Unconventionality
2
............................. 23.57*** 21.20*** 24.09***
(.07) (.06) (.08)
Population density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.21* 2.38** 2.34***
(.10) (.13) (.10)
Percentage nonwhite . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.37*** .00 2.27***
(.07) (.07) (.07)
Median household income . . . . . . . . . . . . . . . . . . . . . . . 2.28*** 2.25** 2.32***
(.08) (.09) (.08)
Percentage ages 2534 . . . . . . . . . . . . . . . . . . . . . . . . . . .27*** .15* .21**
(.07) (.07) (.07)
Percentage college graduates . . . . . . . . . . . . . . . . . . . . . .23** .21* .16
(.09) (.09) (.09)
Percentage college students . . . . . . . . . . . . . . . . . . . . . . .04 2.02 .04
(.04) (.03) (.04)
Metro musical world specialization . . . . . . . . . . . . . . . . 2.17*** 2.27*** 2.16***
(.05) (.04) (.05)
Record industry concentration . . . . . . . . . . . . . . . . . . . . .25** .00 .07
(.09) (.07) (.07)
Music consumption and exhibition concentration . . . . . .02 .04 .04
(.05) (.05) (.05)
Two genres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83*** .39*** .20***
(.02) (.02) (.04)
Three genres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.03*** .53*** .58***
(.02) (.02) (.04)
Unconventionality population density . . . . . . . . . . . . 2.04 2.23*** .17
(.09) (.05) (.13)
Unconventionality
2
population density . . . . . . . . . . . .20 .40* .62**
(.19) (.17) (.21)
Unconventionality percentage nonwhite . . . . . . . . . . .21** 2.13*** .26*
(.07) (.03) (.11)
Unconventionality
2
percentage nonwhite . . . . . . . . . .53*** .26* .66***
(.15) (.11) (.17)
Unconventionality median household income . . . . . . 2.10 2.29*** .05
(.09) (.04) (.13)
Unconventionality
2
median household income . . . . . .05 .38** .44*
(.18) (.14) (.21)
Unconventionality percentage ages 2534 . . . . . . . . . .01 .16*** .04
(.07) (.03) (.10)
Unconventionality
2
percentage ages 2534 ........ 2.21 2.15 2.18
(.15) (.11) (.17)
Unconventionality percentage college graduates . . . . .16 .22*** .39**
(.10) (.04) (.15)
Unconventionality
2
percentage college graduates . . . .14 .02 .33
(.19) (.15) (.23)
Unconventionality percentage college students . . . . . .04 .03 .03
(.04) (.02) (.06)
Unconventionality
2
percentage college students . . . . .07 .11* .05
(.08) (.05) (.10)
American Journal of Sociology
256
and record industry composition play an important role in shaping the rela-
tionship between unconventionality and popularity. For any given world,
the instantaneous returns on unconventionality ufor a band from the typical
MSA can be expressed in terms of the estimated marginal effect:
^
M5^g10 1o^g1kwk

12^g20 1o^g2kwk

u, (1)
where ^g10 refers to the main effect of unconventionality and ^g1krefers to
the cross-level interaction between unconventionality and the kth metro-
level covariate w
k
, with ^g20 and ^g2ksimilarly dened for unconventionality
squared. To help x ideas, we begin by focusing on the payoff function for
an otherwise average band, as given by ^g10 12^g20 u. While the value of ^g10
represents the estimated marginal effect of unconventionality for an other-
wise average band that is equally average in its combination of genres, the
value of ^g20 estimates the degree to which the rate of return changes as this
combination of genres gets further from the world-specic mean. Whether
the average band in a given world benets from unconventionality is reected
in the direction of ^g10 . In this case, positive effects denote popularity rewards,
TABLE 3 (Continued )
Predictor
Rock
Popularity
Hip-Hop
Popularity
Niche
Popularity
Unconventionality metro musical world
specialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.08 2.10*** 2.13
(.06) (.02) (.08)
Unconventionality
2
metro musical world
specialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.13 .22** 2.11
(.11) (.07) (.12)
Unconventionality record industry concentration . . . .14 .19*** .16
(.08) (.03) (.11)
Unconventionality
2
record industry
concentration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.00 .29** .12
(.17) (.11) (.17)
Unconventionality music consumption and exhibition
concentration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .01 2.00 .04
(.06) (.03) (.09)
Unconventionality
2
music consumption and exhibition
concentration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.03 2.02 2.01
(.12) (.09) (.15)
Observations (bands) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,014,966 1,002,941 468,872
NOTE.Results of three separate varying intercept, varying slope modelsone for each mu-
sical world. Intercepts are allowed to vary by metro area, as are the slopes for unconvention-
ality and unconventionality
2
, thus producing a metro-specic polynomial for each. Observa-
tions (metros) 5332.
*P<.05.
** P<.01.
*** P<.001.
Categorical Conventionality in Music
257
while negative effects denote popularity penalties, with the magnitude of each
given by the magnitude of the corresponding parameter estimate.
Looking at table 3, we nd that whereas unconventionality tends to pay
off for the average band in the hip-hop world, this is not the case in the rock
and niche worlds, where increased unconventionality comes at a price, as
evidenced by the direction of the corresponding main effect. This is not to
say that unconventionality is without its costs in the hip-hop world or that
unconventionality goes totally unrewarded among rock or niche bands. In-
deed, in all three worlds the relationship between unconventionality and
popularity for an otherwise average band is characterized by an inverted
U shape, as evidenced by the direction of ^g20 , which is consistently negative
from one world to the next. This is in line with results of the GAMs described
above, lending further support to the idea that regardless of the musical world
in which an otherwise average band resides, the DIC hypothesis holds.
What differs based on the musical world in which a band is located is the
point at which these payoffs become penalties, and these models allow us to
be more precise about that threshold. The notion of a world-specic balanc-
ing point is more than just a loose analogy. For any given world, the esti-
mated balancing point is given by 2^g10 =2^g20. Using this formula, we esti-
mate that for an otherwise average hip-hop band, unconventionality does
not become a liability until the unconventionality score is 0.30 standard de-
viations or more above the world-specic mean, as compared to 0.38 stan-
dard deviations below the world-specic mean for the otherwise average rock
band or 0.47 standard deviations below the world-specicmeanfortheother-
wise average niche band. As the formula for the estimated balancing point
2^g10=2^g20 suggests, these differences are driven not only by differences in
^g10 (i.e., the estimated rate of return for the average band) but by differences
in ^g20. The lower the absolute value of ^g20, the more slowly the estimated rate
of return changes, which is precisely what we observe when comparing the hip-
hop world to its counterparts. We nd that the absolute value of ^g20 in the hip-
hop world is noticeably smaller than it is in the other two, producing a atter
popularity curve in a world where the base rate of return on unconventionality
already tends to be higher, with the balancing point pushed up accordingly.
As equation (1) shows, these relationships are affected by characteristics
of a bands geographic location in a straightforward way: all else being
equal, a 2 standard deviation increase in the value of the kth metro-level co-
variate w
k
increases the estimated rate of return at the mean by a value of ^g1k
and the effect of uon ^
Mby a value of 2^g2k. The latter quantity is signicant
insofar as it governs the atness of the popularity curve. Consider, for exam-
ple, the case of the rock world, where a 2 standard deviation increase in the
size of the nonwhite population in a bands metro area increases the base
return on unconventionality by a value of 0.21, while simultaneously reduc-
ing the effect of unconventionality on the estimated returns in popularity by
American Journal of Sociology
258
a value of 2 0:53 51:06. In other words, as the size of the nonwhite pop-
ulation goes up, the payoff for unconventionality tends to increase, while the
popularity curve tends to get atter, suggesting a context in which the value
of the predicted payoff is less sensitive to differences in the level of unconven-
tionality, as in the optimized plateau (g. 1F). While we observe a similar
pattern in the niche world, things work somewhat differently in the hip-hop
world, where an increase in the size of the nonwhite population tends to reduce
the payoff for unconventionality at the mean. As is the case in the other two
worlds, the popularity curve for the hip-hop world tends to get atterasthe
size of the nonwhite population grows, although the degree of attening is less
pronounced, keeping in mind that the popularity curve in the hip-hop world is
generally much atter to begin with.
To be clear, it is possible for the base rate of return to vary as a function of
metro-level characteristics without inducing comparable changes in the steep-
ness of the underlying popularity curve and vice versa. This is most apparent
in the hip-hop world, where, for example, returns on unconventionality tended
to increase when bands are located in areas with a larger college-educated
population, with the steepness of the popularity curve varying only slightly.
Nonetheless, the cumulative effect of metro-level characteristics tends to be
more pronounced in cases in which both unconventionality and unconven-
tionality squared are subject to interactions, as can be seen in gure 7, which
depicts the changing pattern of marginal effects that results from the inclu-
sion of the cross-level interactions described above. For each metro-level var-
iable, we examine what happens to the marginal effect of unconventionality
for an otherwise average band as we shift the value of the variable in ques-
tion or the level of unconventionality, keeping in mind that payoff for increas-
ingly unfamiliar pairings depends on the level of unconventionality from which
a band starts. In both cases, the shift from low to high is dened by a shift
from the 10th percentile to the 90th. Lookingat the results for the rock world,
for example, we observe a signicant difference in the estimated marginal ef-
fect of unconventionality as the size of the nonwhite population shifts from
low to high, as evidenced by the lack of overlap between the corresponding
condence intervals (CIs).
15
This is true for both conventional rock bands as
well as their less conventional counterparts.
Four key features stand out here. First, while changes in the metro-level
characteristics may shift the payoff a bandreceives for unconventional genre
blendings, it is universally true that the estimated returns on unconventionality
are positive at low levels of unconventionality and negative at high levels of
15
While an absence of overlap between two intervals implies a signicant difference in
the estimated marginal, the presence of overlap does not imply insignicance. To account
for this, we constructed a 95% condence band based on the difference in estimated mar-
ginal effects observed across the central 80% of conventionality scores (see g. C1).
Categorical Conventionality in Music
259
FIG.7.Estimated marginal effects by unconventionality andmetro-level variable sta-
tus. Point estimates refer to the instantaneous marginal effect of unconventionality, with
the corresponding 95% condence interval, constructed using the delta method as imple-
mented in the margins package in R (Leeper 2018). For any given variable, low and high
values refer to the 10th and 90th percentile, respectively. Scales are unique to each panel in
order to increase legibility.
unconventionality. This change in direction is consistent with the idea that
the curve depicting the relationship between unconventionality and popu-
larity is characterized by an inverted U shape, providing further support
for the idea that unconventionality is neither universally positive nor nega-
tive. Second, while the relationship between metro-level characteristics and
the payoff for unconventionality differs across worlds in noticeable ways, it
is generally the case that the rewards and penalties associated with uncon-
ventionality are less pronounced in the hip-hop world. Third, the payoffs
for unconventionality are strongly affected by racial composition, regardless
of world. Finally, apart from racial composition, the payoffs for unconven-
tionality in the rock world appear to be less affected by observable metro-level
characteristics than they are in the other two worlds. This is perhaps most ap-
parent when comparing rock to hip-hop, where the returns on unconvention-
ality are clearly affected by not only racial composition but population density,
median household income, and record industry concentration. More speci-
cally, we nd that for conventional hip-hop bands, the returns on unconven-
tionality tend to be higher in metro areas that are less densely populated, have
lower levels of median household income, and have less record industry con-
centration, all else being equal. The opposite pattern holds, however, for less
conventional hip-hop bands that tend to be penalized more heavily in these
types of areas than they are in areas that are either more densely populated or
more afuent or feature a more prominent local record industry.
DISCUSSION AND CONCLUSION
Back when she was the lead singer of The Weirdos, Janelle Monáe credited
openness to experimentation in her local Kansas City music scene with giv-
ing her the freedom to discoverher inner weirdo.Using data on the genre
combinations of and fandom for over 2 million bands, we show that, within
the genres in which she was working, Monáe was right. As can be seen inthe
online visualization tool, Kansas City bands were atypically tolerated for be-
ing weirdos, a nding also predicted by work on music and urban contexts in
which Kansas City is a crossroadcity in which new genre recombinations
in music have emerged and been distinctively rewarded (Florida and Jack-
son 2010, p. 311). Across the landscape of popular music, Monáe and the
Weirdos were not only exceptionally weird in their genre pairings; they were
also exceptionally rewarded (or at any rate, less penalized) for their uncon-
ventionality in part because of their embeddedness in a particular local con-
text. While Monáes eventual superstardom was not predictable, starting out
she was at least the right kind of weird in the right kind of place for her
weirdness to be tolerated or even encouraged.
Our analysis generalizes this insight to over 2 million bands. Bands from
some cities (such as New York or San Francisco) are rewarded for unusual
Categorical Conventionality in Music
261
genre combinations at relatively high rates, whereas those from others (such
as Buffalo) are less rewarded for unconventionality; others (such as St. Louis)
broadly mirror national patterns, while bands from still others (like Baton
Rouge) are rewarded or punished for unconventionality differently depend-
ing on the musical world in question. Further, we examined a range of met-
ropolitan characteristics that associate with a bands likelihood of being re-
warded or penalized for eclectic musical offerings. Extending a literature on
the geography of popular music, we found that returns on unconventional
musical offerings also vary by the metropolitan characteristics and musical
worlds in which bands are embedded. Very unconventional rock and niche
bands enjoy more tolerance for experimentation when located in racially
diverse metros, while hip-hop bands in cities with a strong record industry
concentration are more rewarded for unconventional genre mixing than
hip-hop bands in cities without. When located in metros with highly educated
populations, unconventional hip-hop and niche bands are more likely tond
an audience relatively open to unusual genre combinations.
Our analysis reveals large-scale patterns in the relationship between un-
conventionality and popularity, highlighting the fact that the average or
typical pattern is a complex combination of diverse local processes. The
average effectis a special case that may in fact be rare. Social reality is in-
delibly marked by contingency and context, but this does not make it un-
knowable. While we have in this article been able to document some sources
of local variation from cities and genre worlds that produce distinctive forms
of relation between unconventionality and popularity, articulating and iden-
tifying the mechanisms by which these forms arise remains an open chal-
lenge. We conclude with reections on what a forward-looking agenda in
search of such mechanisms might look like.
Central to such an agenda is to incorporate a more sociological perspec-
tive into how we conceptualize the social psychological processes identied
by past research of the balancing act between conventionality and uncon-
ventionality. From Simmel (1957) to Brewer (1991) and beyond, authors point
at a desire to t in and stand outresulting in a sweet spot.We add the
sociological proposition that there is no single sweet spot but rather multiple
spots that are contingent on what it means to t in or stand out in different
contexts. Figure 1 shows some shapes this contextualization may generate,
but additional work is necessary to identify how and why precisely one or
the other arises.
We suggest as an accounting device(Griswold 2014, p. 16) four sites that
we believe any prospector should be looking for when digging for explana-
tionsastowhyvarioussweetspotsemerge:(1) categories, (2) producers, (3) con-
sumers, and (4) places. Regarding categories, in advancing explanations of
the types of patterns shown in gure 1, the researcher may want to know
such things as how old the category is and whether it has differentiated into
American Journal of Sociology
262
avant-garde and commercial poles. Or how popular is the category, what
level of generality does it operate on, and how important is authenticity
within the category? For producers, how generally oriented are they to other
producers versus consumers (e.g., a musicians musicianor comicscomic);
do they work full time in the domain or category, or is participation in it part
of a portfolio career; and are they generally compensated through psychic,
status-based, or monetary rewards?The workhorse variablesthrough which
we study cultural tastes such as age, education, childhood arts exposure, di-
versity, and connoisseurship may be the same types of measures that drive
audiences attraction or repulsion to unconventional combinations. And -
nally, places may vary in how much they are dened by a particular category,
if they are stepping-stone places, industry centers,crossroads, immigrant com-
munities, or reputational magnets that draw producers and consumers while
also dening reputations for knowledgeable nonresidents.
We expect that the shapes of the unconventionality-conventionality bal-
ancing acts that we observe will emerge from how features of these four sites
combine. For example, one might consider the degree to whichthe rock world
tended to allow for a greater range of unconventionality with less steep pen-
alties across the middle range of the distribution, while still at this time (as
would later be noted) being less ambitious in innovating newsounds through
recombinant experimentation (Baker 2013; Baroni 2015). This may be be-
cause of a maturity of genres that the rock world contained and a greater
range of conventionally unconventional combinations that are generally ac-
cepted as being legitimately rock-like in theirsounds. Likewise, one could ad-
vance conjectures about the sharper penalty for extreme conventionality in
the niche world. This could occur because to locate oneself outside of the two
major worlds around which popular music orbited in 2007 (rock and hip-
hop) is to already present oneself as catering to an unusual audience; to be
rmly dedicated to just one niche genre in the niche world could moreover
imply a hyperniche self-presentation not in the market for more popularity
beyond the already inclined (Mark 1998). In turn, the second uptick in pop-
ularity in the hip-hop world ts with future recollective accounts of how mu-
sic was being transformed through genre blending with hip-hop (Richmond
2015; Guan 2017). While anecdotal and based on public perceptions, it is in
fact the outcome that would be predicted by our data from 2007. With the
right longitudinal data, scholars could also look at the trajectories of partic-
ular genres, perhaps with unconventional genre blending being more penal-
ized as scenes form (Wry, Lounsbury, and Glynn 2011) and again as they ma-
ture into traditionalist domains in which preservation takes primacy over
experimentation (Lena 2012)this would be a genre-specic temporal ver-
sion of the more spatial inverted U we have documented in this article.
These genre category processes we expect would produce different out-
comes depending on how they interact with mechanisms rooted in audiences,
Categorical Conventionality in Music
263
producers, and places. Thus, part of the decreasing rewards for unusual
genre blending in the rock world could be explained by aging audiences and
amoretraditionalistorientation to the genre and its communities (Lena
2012). Similarly, part of the trend toward cross-world genre blending in hip-
hop likely arises in part from hip-hop artistsincreasing commercial success
creating opportunities for collaboration with other commercially successful
artists from diverse genre communities. And all of these interactions among
genre, producer, and audience can be inuenced by the place in which they
occur. To illustrate, we discuss how two places shift the orientation of audi-
ences and producers toward blending genres in music that emerges there.
First, Nashville provides an intriguing case for building explanations
about shifting rewards for genre classications around the distinctive local
characteristics of a place. Returning to our data, for bands in the hip-hop
world from Nashville, the online visualization tool shows that returns to un-
conventionality generally rise, peaking around .9, before dropping. Bands
at this range of conventionality in Nashville often combine country and re-
lated Americana genres with genres such as soul and R&Bfor example,
country/soul/rock, alternative/southern rock/soul, and Christian/rock/soul.
Jason Eskridge is a case in pointa musician in our data set who lists soul/
acoustic/folk and was featured in 2014 by a local music blogger as an example
of top soul artists in Nashville ( Jay 2014). This specic example exemplies
a broader point about the underlying mechanisms at work: with Nashvilles
growing country music industry concentration, it has become home to large
numbers of talented highly professionally competent musicians, attracting
musicians from other genres as well (Florida and Jackson 2010). Even so,
country and related genres still dominate. This combinationa genre spe-
cialist city with a large recording industry base and professional talent pool
probably makes it more likely that country 1X combinations (which might
be unusual nationally) would occur here and be less penalized for such com-
binations. For example, while there was certainly an Alternative Country
virtual scene that positioned itself against the corporate way of producing
country music centered in Nashville(Lee and Peterson 2004, p. 202), bands
located in Nashville that make alternative/country are still on average sub-
stantially more popular (mean popularity 52:86, 95% CI [2.13, 3.52]) than
alternative/country bands from elsewhere (mean popularity 52:1, 95% CI
[2.26, .05]). This is one example of how local production and consumption
dynamics can encourage specic forms of genre combinations and, more
generally, of how place characteristics such as industry concentration and
local genre predominance can help explain why particular sweet spots be-
tween conventionality and unconventionality may be more likely to arise
in some places than others .
Honolulu provides another illustration of how to incorporate place into
explanations of the origins of patterns in U-shaped curves. Like Nashville,
American Journal of Sociology
264
Honolulu is strongly associated with a specic music genre (Hawaiian). But
Honolulu is less of an industry center and more of a meeting point of diverse
ethnocultural traditions along with a local cultural economy strongly shaped
by tourism. The result is a comparatively at and elongated relationship be-
tween unconventionality and popularity across the middle of the distribution
for the niche world. This may be because in Honolulu there is a long history
of the types of genre blending with Hawaiian music that are unconventional
on the national stage. For instance, the genre blending of reggae and Hawai-
ian music (e.g., replacing the guitar with a ukulele) is a robust phenomenon
in Hawaii (Kale 2017), and the blending of Hawaiian music with country
music dates to the 1920s with Sol Hoopii and his lap steel slide guitar (Silva
2017). In fact, Honolulu, a relatively small metro area, accounts for roughly
one-quarter of all bands who chose combinations of Hawaiian, reggae, and
country genres, andHonolulu bands with these combinations are on average
substantially more popular (mean popularity 5:31, 95% CI [.09, .52]) than
bands with these combinations elsewhere (mean popularity 52:68, 95%
CI [2.83, 2.53]). The prevalence of Hawaiian music there likely means that
genres that diffused to Hawaii from other places (like reggae and country)
have been adapted to blend with the homesound of the local scene (Ben-
nett 2000) and that audiencessome of whom are tourists looking for local
soundsgive Hawaiian bands from Honolulu more room for unusual com-
binations with Hawaiian music than from elsewhere. Overall, scaling down
in this way into smaller genre communities or smaller metropolitan scenes
could better allow for teasing out the relationship between psychological ex-
planations and mesolevel sociological mechanisms. Even so, the typology we
formulated in table 2 could be used to make relatively general hypotheses
about how local cultural scenes make particular curves more or less likely in
experimentalist or traditionalist places.
To be clear, while our observations about places like Nashville and Ho-
nolulu are to some degree speculative, they show how for scholars of urban
studies, culture, and creativity our ndings and the accompanying online vi-
sualization tool can serve as a rst step thin description(Spillman 2014)
that precedes the thick description of qualitatively investigating meaning
making, mechanisms, and processes within local contexts or within specic
genres and the family ofgenres they are most combinedwith. Such may also
be true for online spaces (Peterson and Bennett 2004), which may be more
shaped by categories, producers, and consumers than they are by geographic
places, or as places themselves they may have their own features that drive
the local relationship to rewarding unconventionality. This suggests that in
the long-run, qualitative, historical, and networks-based studies (e.g., Gra-
zian 2005; Lena 2012; Corneld 2015; Crossley 2015; Skaggs 2019) may
be more equipped than our more macrolevel approach to tease out local
dynamics.
Categorical Conventionality in Music
265
We believe the approach developed in this article is highly portable to
other domains. For example, using data from Artprice and ArtFacts, global
artists could be identied as operating within worlds through the media and
movements in which they work and then indexed for conventionality within
those worlds while also being geographically located in cities or countries. As
in Buchholz (2018), with the use of these data sources, popularity could then
be measured two ways: through both auction sales and gallery exhibitions.
Some cities or countries may produce more popular unconventional artists
than others, just as unconventionality may be rewarded differently in the
auction market and gallery market (relatedly, see van Venrooij and Schmutz
2018) or in some artistic worlds over others.
As another example, using American Sociological Association section
membership data the researcher could index the conventionality of multiple
section memberships across each member (e.g., Culture and Theory section
membership may be highly conventional, whereas Culture and Rationality
and Society may not) and then nest members in their departments. From
this, as in our typology of cities, one could then create a typology of depart-
ments, potentially with conventionalists, normalists, traditionalists, and ex-
perimentalists classied by the conventionality of their memberssection
memberships. Going a step further, one could then index the conventional-
ity of section memberships for participants in the employment fair, model-
ing over time whether unconventional job market candidates are more likely
to be employed by experimentalist departments than normalist or tradition-
alist departments. Like the example of the global art market, while porting
the basic contours of our approach to this setting may introduce a new set of
challenges, it may also have substantial payoffs.
Overall, we see this work as contributing to multiple literatures. For the
categories literature we hope our work serves as another vote in several re-
cently emergent trends. First, we hope this work serves as another call to
study the effects of categories on popularity beyond the scope of the categor-
ical imperative (Zuckerman 2017). Second, we believe this article signals a
direction in which research can head, as work on categories can be brought
back into conversation with a wider swath of sociological literature extend-
ing back to Simmel, which treats market actors as balancing between two
competing imperatives. With limited exceptions, work in the categories lit-
erature mostly operates along the rst row of proposed relationships in g-
ure 1. We additionally hope this work serves as a call for the further inves-
tigation of both nonlinear and nonmonotonic functions in the relationship
between categorical unconventionality and popularity. To do so would re-
quire treating categories as positioned in relational space, which along with
others (Kovács and Hannan 2015; Wry and Castor 2017; van Venrooij and
Schmutz 2018) we feel is a fruitful way to move forward in this line of re-
search. With regard to category assignments, given the varied purposes that
American Journal of Sociology
266
genre designations serve (DiMaggio 1987; Lena 2012; Negus 2013), while
our data are on producers self-claims, future research could home in on cases
in which there are classicatory mismatches across different classifying groups
(e.g., producers and consumers).
For the sociology of culture, this work brings further evidence to the en-
durance of regionalism in cultural American life (Griswold and Wright
2004; Leschziner 2007; Griswold and Wohl 2015) and even in virtual com-
munities (Peterson and Bennett 2004; Allington 2014). For work on urban
culture and the geography of music, this article makes several contribu-
tions. While most quantitative research in this area relies on industry and
ofcial government statistics (Florida, Mellander, and Stolarick 2010), we
show the potential in using other data sources to capture the full spectrum
from local grassroots garage bands and solo mix-tape artists to superstars.
With so many bands invisible to ofcial sources, we are able to capture dis-
tinctive local musical contexts such as those in Buffalo, Baton Rouge, and
St. Louis, which are too often overlooked for industry-based studies of New
York, Los Angeles, and Nashville. Moreover, we create a new measure of
local musical conventionality and unconventionality, which can be added
to more typical measures such as industry concentration. While in this work
we focus on the level of musicians and bands self-presentation, we hope
that future work merges our approach with exciting work happening at
the level of discrete objects such as songs (e.g., de Laat 2014; Askin and
Mauskapf 2017). Likewise, while we focus on the relationship between con-
ventionality and popularity as it relates to spatial and relational communi-
ties, we believe that other axes of variation such as artist sociodemographics
(e.g., de Laat 2019), location in a genres trajectory (Lena 2012), or industry
conditions embedded in different historical time periods (e.g., Peterson and
Berger 1975; Lopes 1992; Dowd 2004) might provide additional sites of
meaningful variation. In the same vein, future researchers could investigate
the degree to which a genre or particular combinations of genres (or fandom
for genres) is embedded within a particular locale versus being diffuse with-
out a geographic home base,perhaps documenting the degree to which
different musics and their fandoms live locally, translocally, or virtually
across geographic divides (Peterson and Bennett 2004). Measurement tech-
niques from economic geography such as location quotients might be use-
fully adapted to this end.
Finally, we show how big data sources can be used to advance older the-
oretical ideas, such as the Chicago schools (both new and old) sensitivity to
local context and variation amid more general patterns (Sampson 2012),
while also illustrating what a forensic approach to big data can look like
(McFarland et al. 2016). By using a suite of quantitative techniques for con-
textualizing and visualizing local distinctiveness, we hope to bring sensibil-
ities traditionally associated with qualitative research to larger-scale studies,
Categorical Conventionality in Music
267
while at the same time encouraging qualitative and local researchers to sit-
uate their ndings and cases comparatively, against other U.S. metropolitan
locations. Facilitating this kind of comparative dialogue between local and
general is one of the true advantages of big data. Our study shows the poten-
tial it holds.
American Journal of Sociology
268
APPENDIX A
TABLE A1
Genres by World
Hip-Hop Rock Niche
Club Acoustic Folk Rock Powerpop ACappella Dub Hawaiian Progressive House Visual
Crunk Alternative Funk Progressive Acousmatic Dutch Pop Healing & Easy
Listening
Psychobilly Western
Swing
Freestyle Ambient Fusion Psychedelic Afro-beat Electro House Regional Mexican Zouk
Hip-Hop Americana Garage Post-punk Big beat Electronica IDM Samba
Hyphy Bluegrass Gospel Punk Black Metal Emotronic Idol Spanish Pop
Latin Blues Grunge Religious Bossa Nova Flamenco Industrial Shoegaze
Salsa Christian Hardcore Rock Breakbeat French Pop Italian Pop Showtunes
Lyrical Classic Rock Indie Rockabilly Breakcore German Pop Japanese Classic Tango
Neo-soul Classical & Opera Jam Band Roots Music Celtic Ghettotech J-Pop Tape Music
R&B Comedy Jazz Screamo Christian Rap Glam Jungle Techno
Rap Country Lounge Ska Concrete Gothic K-Pop Thrash
Reggae Electroacoustic Metal Southern Rock Death Metal Grime Live Electronics Trance
Reggaeton Emo New Wave Surf Disco House Grindcore Melodramatic Popular Trip Hop
Soul Experimental Pop Swing Downtempo Happy
Hardcore
Minimalist Tropical
Folk Pop Punk Drum & Bass Hard House Nu-Jazz Turntablism
Categorical Conventionality in Music
269
APPENDIX B
Dening Genre Unconventionality
Extending Lizardos (2014) measure of effective omnivorousness,we
measure genre unconventionality as follows. Given an npadjacency ma-
trix Adepicting the relationship between bands and genres, the degree of
numerical overlap between any given pair of genres jand kis given by
C5A0A. We use this information to construct a matrix of similarity scores
O, where
ojk 5cjk
min cjj,ckk
ðÞ
:(B1)
The resulting scores range from 0 to 1, with higher scores indicating a more
conventional pairing, much like a Jaccard coefcient. The chief difference is
that whereas Jaccard-based measures standardize the value of c
jk
by divid-
ing by the total number of unique entities to which jand kare collectively
tied (i.e., cjj 1ckk 2cjk), our measure standardizes the value c
jk
by dividing
by the minimum value of c
jj
and c
kk
. This captures the degree of overlap
from the perspective of the smaller of the two genres.
16
The advantage of
this approach over the conventional Jaccard measure is that it avoids the
tendency to conate inequity in the magnitude of c
jj
and c
kk
(i.e., the number
of entities tied to jand k, respectively) with a lack of overlap or clustering
(Latapy, Magnien, and Del Vecchio 2008).
Our approach diverges from Lizardo (2014) in two important ways. First,
instead of working with o
jk
, which measures the degree of similarity be-
tween a given pair of genres, we focus instead on the dissimilarity given
by djk 512ojk. The resulting scores still range from 0 to 1, but higher scores
indicate more unconventional pairings. Second, instead of making a bands
unconventionality score cumulative, adding to its score when more genre
choices are made, we take the mean of each bands genre-pair unconvention-
ality. In effect each genre pairing receives an unconventionality score, and a
bands overall unconventionality score is the mean of each genre pair it
chooses. We take means instead of sums because bands can self-select the
number of genres (up to three total), so the very number of genres listed (re-
gardless of how unusual any pairing is) can affect the score. As a result, if we
summed across all pairs, a band would get a higher score for describing itself
as pop/rock/alternativethan as grindcore/ghettotech/[blank].
16
As a robustness check, we compared our results to the results produced using a number
of Jaccard-based measures. We found that, as expected, unconventionally scores tended
to cluster near 1 when using a Jaccard coefcient to measure the degree of overlap be-
tween genres. Nonetheless, our results do not depend on the choice of measure. More spe-
cically, we nd that the relationship between popularity and conventionality is charac-
terized by an inverted U shape, regardless of which measure we use. The results of our
multilevel regression are similarly unaffected.
American Journal of Sociology
270
Taking the mean of genre pair unconventionality scores avoids this prob-
lem. Accordingly, the unconventionality score uassociated with band iis
given by
ui5ojNiðÞ
okNiðÞ
djk
mimi21ðÞ
, (B2)
where N(i) refers to the set of all genres chosen by band i(which Lizardo
refers to as the cultural neighborhood), and mi5ojaij refers to the total
number of genres selected by band i. In our regression models, we also sep-
arately control for the number of genres selected, in an effort to account for
the effect of adopting multiple genre labels, thus allowing the effects asso-
ciated with the number of genres to differ from the effects associated with
the particular combination of genres adopted.
Unconventionality scores are calculated using a bands complete set of
genres. A band counts as part of a musical world so long as at least one of
its genres is in that world. If a band lists one genre in the rock world and
two in the hip-hop world, all three MySpace genres are considered in the cal-
culation for the score for both worlds. For bands whose genres span across
multiple worlds, we calculate separate scores for them for each world. The
fact that a band can belong to more than one world means that a band can
also have more than one unconventionality score, with the level of uncon-
ventionality depending on the world in which it is being viewed. By way of
example for the value of this approach, a band like Rage against the Machine
lists its genres as rock/rap/punk. This mirrors the on-the-ground reality of
Rage against the Machine self-identifying with and actively participating
in both the rock and hip-hop worlds: both its stated musical inuences
(Black Sabbath, the Sex Pistols, Public Enemy, Cypress Hill) and its concert
touring (U2, Wu-Tang Clan) traverse these worlds (Everley 2017). In the
hip-hop world, it is a band with rap inuences that also participates in rock
and punk genres, whereas in the rock world it is the opposite. Our measure
leaves open the real world possibility that the unconventionality of Rage
against the Machine is interpreted differently when performing with U2 and
when performing with Wu-Tang Clan, while also not enforcing that differ-
ence (e.g., the rock and rap worlds are allowed to be associated with genre
spanning combinations differently, but they are not forced to). Our measure
reects these differences: in the rock world, Rage against the Machines genre
combination is conventionally unconventional, lying around the 50th per-
centile of rock world unconventionality. However, the same combination was
near the 83% of unconventionality in the hip-hop world. This, we believe,
better captures both the theoretical underpinnings of our approach and how
the real world operates.
17
17
As an alternative procedure and robustness check we reran our procedures with bands
assigned exclusively to the world of their rst self-reported genre designation, which did
Categorical Conventionality in Music
271
APPENDIX C
Signicance Tests for Nonlinear Interactions
Depicting the results of a nonlinear interaction is notoriously difcult be-
cause the effect of interest differs as a function of both the value of the cor-
responding variable as well as the value of the variables that it is allowed to
interact (see Mize [2019] for a recent review). To address this problem, we
examined how the estimated marginal effect of unconventionality changed
when we changed the level of unconventionality or the level of a given metro-
level variable, focusing on the contrast between the 10th and the 90th per-
centile of each. As can be seen in gure 7, there is little doubt that if we hold
the value of the metro-level variable constant, the marginal effect of uncon-
ventionality at the 10th percentile of unconventionality is signicantly differ-
ent from what it is at the 90th percentile. What is less clear is whether the
estimated marginal effect of unconventionality differs signicantly across
levels of each metro-level variable, holding unconventionality constant.
As a rst approximation, we focused on the presence of nonoverlapping
intervals. The difculty with this approach is that while a lack of overlap
between two intervals implies a signicant difference, the presence of over-
lap does not imply insignicance. Rather than comparing intervals, a more
appropriate approach is to construct an interval around the estimated dif-
ference. Toward this end, we used the delta method to construct a 95% con-
dence band based on the difference in estimated marginal effects that results
when we shift the level of a given metro-level variable from the 10th percen-
tile to the 90th. The results are shown in gure C1, which depicts the estimated
difference observed across the central 80% of conventionality scores for each
metro-level variable. A positive difference indicates that the estimated mar-
ginal effect of unconventionality at the 90th percentile of the metro-level
variable in question is larger than it is at the 10th percentile of that same
metro-level variable. A negative difference, however, indicates thatthe mar-
ginal effect of unconventionality at the 10th percentile is larger than it is at
the 90th percentile, with no difference denoted by the dashed line. When the
dashed line falls within the bounds of the condence band, it means that the
estimated difference in the marginal effects is signicant at that point.
not meaningfully change our results. By way of further exploration, we created a variable
for bands who are purists,where purists only select MySpace genres within a given
world. Overall, rock purists are more popular than world-crossing rock world bands,
whereas niche and hip-hop purists are less popular. This is likely because rock world mu-
sicians are more popular in general. Controlling for purists in our regression models does
not substantively alter our results.
American Journal of Sociology
272
FIG. C1.Differences in estimated marginal effects
APPENDIX D
Constructing Musical Worlds
We follow a two-stage strategy to partition MySpace data into musical
worlds, as discussed in more detail in Silver et al. (2016), some of the text
from which we reproduce here. A rst step is to reject the null hypothesis
that there is a completely random relationship among a bands genre choices.
Whatever a band chooses for genre 1 would be arbitrarily related to its choice
for genres 2 and 3 and vice versa. This is admittedly an unlikely scenario, but
it does provide a useful baseline. Using a community detection (modularity
optimization) algorithm, we nd that genre choices are far from random. Cer-
tain genres are paired with one another with great consistency. To determine
this, we catalog all band-supplied genre combinations as a network dened
by the frequency with which bands coselect them. For instance, if one band
chooses rap and metal, there would be one edge between the rap and metal
nodes, and so on, with numerical frequency for rap and metal and all other
activated genre-by-genre ties.
Given that bandsgenre choices do evince latent structural patterns, the
second step is to examine the nature of these patterns. By applying modu-
larity clustering to the MySpace genre hierarchicallythat is, repeatedly
subdividing genre communities until it is impossible to do so again with sta-
tistical signicancewe are able to characterize in greater detail the MySpace
universes organization of musical genres. We nd a fundamental rst divi-
sion among rock, hip-hop, and niche musical worlds that breaks down fur-
ther into 16 distinct genre communities. The current study focuses on the
highest-order division (rock, hip-hop, niche) for the sake of simplicity and
claritywe are examining variations between three worlds and hundreds
of metropolitan areas. Nevertheless, examination of the 16 lower-order com-
munities is an important further area of research and a useful way to under-
stand the meaning of the higher-order worlds.
To nd the latent structure of MySpace bandsgenre selections, we create
a large and complex network by mapping the band-provided colistings of
(up to three) genres. Genres are considered relatedonce when a band lists
them together. In the event that a musician chooses only one genrethereby
providing no information about how genres are associated with one an-
otherthe musicians choices are not includedin the analysis. To make sure
this did not bias our results, we compared the distribution of genre nomina-
tions for genres that are listed alone versus genres that are listed in some sort
of combination. We found that the distributions do not differ substantially.
Thus, eliminating single genre selections from our analysis does not bias the
resulting genre clusters in any signicant way, nor would providing some
kind of unique score for single genres change the combinatory patterns that
we currently see.
American Journal of Sociology
274
For the full population of bands in the data that did list more than one
genre designation, greedy modularity optimization is employed to identify
genre communities. Greedy modularity optimization was developed by Clau-
set, Newman, and Moore (2004). This algorithm partitions a network by max-
imizing its modularity, a measure that quanties a networks community struc-
ture by providing a value for every clustering within a given graph. The general
idea is to employ a random graph on the same vertex set that does not have
any community structure and compare the edge density of the clusters in the
original graph with the edge density of the clusters in the random graph. The
greater the difference between the two edge densities, the more community
structure the given clustering describes. We use the version operationalized
in Rs IGraph package, which outputs the best community structure (struc-
ture with the highest modularity score) possible.
But modularity algorithms, like most clustering algorithms, have no uni-
versally accepted signicance tests. In other words, there is no consensus as
to whether a modularity score of .1, .3, or any value indicates a realversus
an arbitrary community structure. In certain situations, however, it can be
relatively easy to apply statistical techniques that approximate a signi-
cance test. While it is unclear how we would dene, let alone test, the sig-
nicance of the entire community structure discovered in this study, it is
relatively straightforward to test whether a single identied community is
signicantly structurally separatefrom the rest of the large network. This
can be done with a Wilcoxon rank-sum test, which, applied to this context,
assesses whether there is a statistically signicant difference between the
number of in-edges and out-edges adjacent to members of a given commu-
nity. If a community has signicantly more in-edges than out-edges, the com-
munity is considered statistically signicanta relatively unied group of
genres with relativelystrong boundaries. And if all its constituent communi-
ties are signicant, it is reasonable to consider an entire community structure
statistically signicant.
In this study, running the modularity optimization algorithm and signif-
icance testing was procedurally united. In order to identify the most specic
genre complexes possible, we do not simply run the modularity optimiza-
tion once. Instead, we run the modularity optimization and the rank-sum
test in direct succession and progressively until further dividing a commu-
nity into smaller, more specic groupings no longer yields statistically sig-
nicant communities. Our results therefore present a community structure
in which all identied communities are indivisible into smaller signicant
communities and are themselves signicant at the P<:01 level.
We used a modularity-based approach to community detection because our
primary interest is to identify areas of density in a graph composed of weighted
and undirected edges. Our data are simple: musicians select genres, and genres
are considered related when they are coselected by many musicians. Areas of
Categorical Conventionality in Music
275
density therefore represent in a clear and straightforward way groups of genres
that are commonly associated with one another across the millions of musi-
cians in our sample. Given the nature of our data, structure comes from edge
weights, so the community detection algorithm chosen must be able to work
with edge weights. Since our edges are undirected, the community detection
algorithm must be chosen accordingly. Modularity-based approaches are a pri-
mary example of internal density approaches that operate on weighted, undi-
rected edges (Coscia, Giannotti, and Pedreschi 2011); here we use Igraphsim-
plementation of greedy modularity optimization.
Figure D1 is a dendrogram that details how a rst-order clustering into
rock, hip-hop, and niche music worlds is broken down into 16 genre com-
munities, with provisional names to capture their main tendencies. For ev-
ery division, the communitys in-edges outnumber its out-edges at a statis-
tically signicant level (P<:01). Table D1 summarizes the MySpace genres
within each community.
We performed a placebo test to ensure that the modularity observed in
the MySpace network is not due simply to network density, randomly re-
wiring the network 1,000 times. While the modularity coefcient for the
FIG. D1.Summary of a dendrogram of MySpace genres with 16 genre communities
at its leaves.
American Journal of Sociology
276
actual MySpace network is 0.31, the average modularity for our 1,000 random
simulations is only .04. This very dense network exhibits almost no modu-
larity at all when its edges are randomly allocated. Thus, the clustering pat-
terns we observe in the MySpace network are highly unlikely to be due to ran-
dom chance.
Progressive modularity clustering moves from the left to right of the den-
drogram in gure D1. Furthest on the left, the rst-order breakdown sepa-
rates out three main worlds of popular musicrock, hip-hop, and niche
worlds. As we move to the right, the rock world breaks down to its subcul-
turalvarieties, which we call countercultural rock, mainstream rock, and
punk offshoots, and then ner categories therein. The hip-hop world, dom-
inated by rap, hip-hop, and R&B, breaks down no further into statistically
signicant communities. They comprise both a major musical world and an
endcommunity. The niche world represents a variety of less popular (as
dened by the frequency with which they are selected by musicians) genres
and communities. It is essentially a category encompassing music not strongly
TABLE D1
Genres within Communities
Genre Community MySpace Genre
Hip-hop Club, Crunk, Freestyle, Hip Hop, Hyphy, Latin, Lyrical,
Neo-soul, R&B
Avant-garde Ambient, Classical & Opera, Comedy, Experimental,
Electroacoustic, New Wave, Progressive, Psychedelic
Electronic/dance Breakbeat, Downtempo, Drum & Bass, Dub, Electro, IDM,
Tropical
Extreme metal Black Metal, Death Metal, Gothic, Grindcore, Thrash
Good old boy Americana, Bluegrass, Country, Rockabilly, Roots Music,
Southern Rock
Jammy Blues, Classic Rock, Funk, Fusion, Jam Band, Jazz, Lounge,
Swing
Japanese Healing & Easy Listening, Idol, Japanese Classic, Melodramatic
Popular
Keeping the beat alive ACappella, Afro-beat, Big beat, Christian Rap, Disco House,
Nu-Jazz
Other Ghettotech, Grime, Hawaiian, Regional Mexican, Showtunes,
Western Swing, Zouk
Pop/rock Pop, Powerpop, Rock, Alternative, Indie
Punk metal Emo, Screamo, Hardcore, Metal
Punk rock Garage, Grunge, Pop Punk, Punk, Ska, Surf
Rave Acousmatic, Electronica, Hard House, House, Industrial,
Techno, Progressive, House, Trance, Trip Hop
Spiritual Acoustic, Folk, Folk Rock, Christian, Gospel, Religious
Underground club Glam, Happy Hardcore, Jungle, Psychobilly, Shoegaze,
Turntablism, Visual
World music Bossa Nova, Breakcore, Celtic, Concrete, Dutch Pop, Emotronic,
Flamenco, French Pop, German Pop, Italian Pop, J-Pop,
K-Pop, Live Electronics, Minimalist, Samba, Spanish Pop,
Tango, Tape Music
Categorical Conventionality in Music
277
tied to the two dominantpoles of American music in the 2000s: rock and hip-
hop. These include most notably electronic music genres, dark or extreme metal,
and various underground and world music genres, which emerge and fur-
ther subdivide as we move to the right of the chart.
As an alternative procedure and robustness check, we reran our analysis
using these 16 communities and treating them as the genres,using the same
unconventionality formula as described in appendix B. In other words, we
examined degree of conventionality across these 16 umbrellacategories
that operate at the same level and then plotted the resulting variable against
band popularity in gure D2. This approach accounts for the possibility that
the balancing actwe observe is an artifact of differences in the number of
genres within worlds by treating lower-order genre communities themselves
as the relevant musical units.
FIG. D2.Relationship between unconventionality and popularity, where unconven-
tionality is calculated with each of the 16 genre communities being treated as genres.
American Journal of Sociology
278
As can be seen, this does not meaningfully change our results for the basic
inverted U between unconventionality and popularity, which we also con-
rmed with two-line tests. Similarly, we examined how the relationship be-
tween this measure of unconventionality and popularity shifts across metro
areas. As gure D3 shows, we nd substantially similar basic patterns of
association, with race, income, and record industry concentration showing
signicant effects.
FIG. D3.Variation in returns on unconventionality by metro-level characteristics, for
unconventionality calculated using 16 genre communities as genres.
Categorical Conventionality in Music
279
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