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Sustainability2021,13,12827.https://doi.org/10.3390/su132212827www.mdpi.com/journal/sustainability
Review
Megaprojects,Gentrification,andTourism.ASystematic
ReviewonIntertwinedPhenomena
MarcusHübscher
InstituteofUrbanDevelopmentandConstructionManagement,LeipzigUniversity,04109Leipzig,Germany;
huebscher@wifa.uni‐leipzig.de;Tel.:+49‐3419‐733‐768
Abstract:Withintheneoliberalcontextoftoday’surbanism,agrowingnumberofinner‐citymega‐
projectsaimtotransformbrownfieldsites—accompaniedbygentrificationandtourism.However,
thereisnosystematicreviewexploringtheinterplaybetweenthesephenomena.Thispaperaimsto
systemizetheexistingscientificcontributionsbymeansofaliteraturereview.Usingdifferentdata‐
bases,atotalnumberof797scientificdocumentshavebeenidentified.Afterseveralscreeningsteps,
afinalsetof66studieswasincludedinthereview.Ipresentananalysisfromaquantitativeanda
qualitativeperspective,exploringbibliometricaspects,concepts,methods,andrelevantlinesofdis‐
cussion.Theareastudiedisarelativelyyoungandemergingfield.Withinthediscussion,thereisa
strongdominanceofcountrieslocatedintheglobalnorth,withSpain,theUK,andtheU.S.atthe
forefront.Fromamethodologicalpointofview,qualitativeandmixedmethodsaremostlyapplied.
Thediscussionofmegaprojects,gentrification,andtourismhasanimportantdescriptivefocus,with
maintopicssuchasplanning,justice,andmotivations.Thereareconsiderableconceptualdeficits,
asone‐quarterofthestudiesdonotclearlyexplaintheirmethods.Futureresearchneedstofind
waystoenableknowledgetransfertoplanningpractice.
Keywords:megaprojects;brownfield;large‐scaleurbandevelopmentprojects;gentrification;
tourism;literaturereview
1.Introduction:AnEmergingFieldofStudy
Large‐scaleurbanprojectsareanessentialelementintheneoliberalcity.Megapro‐
jectsworldwidedocumentthis,reportingfromtheGuggenheimMuseumandthe“Cin‐
derellatransformation”ofBilbao[1],tothebusiness‐friendlyCanaryWharf,London[2]
andtheexporthit“BarcelonaModel”[3].
Therisingnumberofsuchprojectsgoesbacktotwoparallelandoverlappingtrends.
First,theeconomictransitiontowardpost‐industrialsocietiesturnsformerlyindustrially
usedareasintobrownfieldsites,which,oftenlocatedinstrategicallyimportantdistricts,
citiesneedtocopewith[4].Second,theadvancingneoliberalizationhassharpenedcom‐
petitionbetweencitiesonaglobalscale[5].Inthiscontext,urbanmegaprojectsarere‐
gardedaswelcomeopportunitiestogivethesecitiesafacelift,establishamarketableim‐
age,andboosttheurbaneconomy[6].Bydefinition,theseprojectsseektorenew,regen‐
erate,orupgradetheareawheretheyarebuilt.Simultaneously,theyoftenfostertouristi‐
fication,segregation,orgentrificationthat,onceunleashed,aredifficulttotame.
Giventheobviousrelevanceofthistopicincitiesworldwide,itisnotsurprisingthat
researchonlarge‐scaleurbandevelopmentsisalsoskyrocketing.Thenumberofscientific
publications(searchtermswere“megaprojects”AND“large‐scaleurbandevelopment
projects”AND“brownfield”)hasoctuplicatedfromonly76in2010to610in2020onthe
WebofScience[7].Theexpandingscientificinteresthasfueledvariouskeyworksinthe
literaturefromdifferentbackgrounds,forexample,management[8],planning[9],archi‐
tecture[10],orurbanism[6].Althoughadjacentfieldsofresearchsuchasgentrificationor
Citation:Hübscher,M.
Megaprojects,Gentrification,and
Tourism.ASystematicReviewon
IntertwinedPhenomena.
Sustainability2021,13,12827.
https://doi.org/10.3390/su132212827
AcademicEditors:NađaBeretić,
ArnaldoCecchiniandValentina
Talu
Received:19October2021
Accepted:16November2021
Published:19November2021
Publisher’sNote:MDPIstaysneu‐
tralwithregardtojurisdictional
claimsinpublishedmapsandinstitu‐
tionalaffiliations.
Copyright:©2021bytheauthor.Li‐
censeeMDPI,Basel,Switzerland.
Thisarticleisanopenaccessarticle
distributedunderthetermsandcon‐
ditionsoftheCreativeCommonsAt‐
tribution(CCBY)license(https://cre‐
ativecommons.org/licenses/by/4.0/).
Sustainability2021,13,128272of23
urbantourismaremuchmoreestablished,theintersectionbetweenthesetwofieldsand
megaprojectsisrelativelynew.Thisisthegapthatthispapershallhelptofillbysystem‐
izingthealreadyexistingknowledge,whichexpandsatastrongpace.Todate,therehas
beennosystematicreviewofstudiesabouttherelationshipbetweenlargeurbanprojects,
gentrification,andtourism,whichiswhyIarguethatanoverviewcontributestoabetter
understanding.
Theaimofthispaperisnottodiscusstherelationshipbetweenmegaprojects,tour‐
ism,andgentrificationindepth.Rather,itistosystemizecontributionsthathavealready
beenmadeandserveasasummarizingguidethroughtheongoingdiscussionthattakes
placeintheseincludedstudies.Iwillstructurethisdescriptivereviewasfollows.Section
twopresentsthestepstakenduringtheliteraturereview.Sectionthreediscussesthere‐
sultsandcontainsbothabibliometricandacontent‐relatedanalysis.Itisfirstlyrevealing
toobtaininsightsintothe“when,whereandhow”ofthesestudies.Iwillparticularly
documentthespatialdimensionsinthediscussions.Secondly,withregardtocontents,
theobjectiveistoidentifythemostrelevanttopics,conceptsandframespresentedand
exploretheexistinglinesofdiscussion.Sectionfourdrawsaconclusionbasedonthese
findings.
2.MaterialsandMethods:ConductingtheReview
Conductingasystematicliteraturereviewconsistsofseveralsteps.Istronglyrelied
onthesuggestionsmadebyGreenetal.[11],RowleyandSlack[12],andparticularlyXiao
andWatson[13],whoprovidedguidanceonreviewsinplanningresearch.Apartfrom
that,IalsofollowedthePRISMA2020guidelines,whichareasetofrequirementstofacil‐
itatesystematicreviews[14].Onthatbasis,Iunderstandsystematicreviewsasaproce‐
dureto“collateandsynthesizefindingsofstudies”[14]inorderto“distilltheexisting
literatureinasubjectfield”[12].
Thefirststepsinareviewaretodefinetheproblemanddevelopareviewprotocol
[13].Basedonmyresearchquestionpresentedinsectionone,thispaperaimstoexplore
therelationshipbetweenmegaprojects,gentrification,andtourism.Hence,theseterms
arethekeywordsthatIusedinsearchengines.Myunderstandingoftheseconceptsis
basedonDiazOruetaandFainstein[6],Flyvbjerg[8],andSwyngedouw[15],whomade
importantcontributionstothesephenomena.Inthispreliminaryresearch,Ialsofound
thattermsarenotusedconsistently—particularlyinthecaseofmegaprojects.Thereare
othertermsapplied,notalwaysinasynonymouswaythough,suchas“large‐scaleurban
developmentprojects”[15].Theremightevenbecaseswheretheauthorsdescribemega‐
projectswithoutclearlylabellingthemassuch,asisthecasein“brownfield”redevelop‐
mentprojects.Idecidedtoalsoincludethesetwokeywordsinmysearchandlookedfor
scientificcontributionsthatcontain“gentrification”,“tourism”,and“megaprojects”(or
oneoftheabove‐mentionedsynonyms)byconnectingthesetermswith“AND”operators.
Withregardtoconductingthereview,theelectronicdatabasesmustbeselected.Ac‐
cordingtoGreenetal.[11],itisessentialtocombineseveralsearchenginessincenoneof
themcontainalloftherelevantdocuments.Inthisliteraturereview,IcombinedGoogle
Scholar,WebofScience,ProQuest,SocIndex,andtwouniversitylibrarydatabasesthatI
hadaccessto.Incasethereweremanyresults,Iselectedthefirst100hits,sortedbyrele‐
vance.
AsFigure1shows,Istartedthereviewwith797hits,whichIfoundinAugust2021.
Allofthemwereimportedtoaliteraturemanagementprogram(Endnote,versionX9.3.3),
whichdetected192duplicates.Inthefollowingscreeningprocess,Iappliedatwo‐stage
protocol[13].Fortheremaining605entries,Iscannedthetitle,abstract,andkeywords,
andexcludedrecordsthatwerenotrelevanttomyresearchquestion.IncaseIwasunsure,
Ikeptthetextinthereview,basedonXiao’sandWatson’s[13]recommendation.
Sustainability2021,13,128273of23
Figure1.FlowdiagramforthesystematicreviewbasedonPRISMAprinciples.Note:UniversityLibrariesareanony‐
mized.
Theremaining308recordswerescreenedforretrievalandeligibility,basedontheir
fulltexts.Exclusioncriteriawere,forexample,non‐Englishlanguageandalackofacces‐
sibilityorquality(Figure1).Textsthatdidnotundergopeer‐reviewedprocedureswere
alsoeliminated.IexcludedstudieswhereIparticipated,toreducepersonalbias,butI
addedthemwhenputtingtheresultsintoabroadercontext.
Apartfromthat,rulesforinclusionwereapplied.Ionlyincludedthosetextsinmy
reviewthathadobviouslinkstothethreemainconcepts(megaprojects,gentrification,
tourism).With66finaltexts,Iperceivedthatthenumberofstudiesincludedwasalready
high,whichiswhyaback‐and‐forthsearchwasnotadded.
Thisprocedureimplicatesseverallimitations.Basedonthestrictselectionofthe
searchterms,thereviewdoesnotincludestudiesthatmighthavethesameresearchin‐
terestbutusesdifferentwording.Moreover,onlyopenaccesscontributionsandstudies
availableviatheuniversity’slibrarycouldbeaccessed,whichreducedthenumberofpos‐
siblerecordsby22%.Afurtherpointofdiscussionisthedecisiontoonlyincludepeer‐
reviewedandhigh‐qualitycontributions.Thatmeansthatmostoftheconferenceproceed‐
ingsandgreyliteraturewereexcluded.Hence,thereviewpresentedherecannotclaimto
discoverthebreadthofstudiesbutratherrepresentsaspecificsection.Inthisrespect,a
literaturereviewcontainsthesubjectivedecisionsmadebytheresearcherandtheresults
willdifferifanyoftheabovementionedfactorsarealtered.However,revealingthechosen
Sustainability2021,13,128274of23
procedureincreasesthereplicabilityofthisreviewandthisiswhatIregardasgoodsci‐
entificpractice.
Thefinalstepwastoanalyzethedocumentsincludedandreportthefindings[13].
Here,IappliedtechniquesofaqualitativecontentanalysisbasedonMayring[16].To
developthecategorysystem,Iappliedtwoapproaches(deductiveandinductive).Iset
upcategoriesthatderivefromtheresearchquestionandthebasicliteraturethatIusedto
determinethekeywords(deductive)[17].Therewereseveralframeworkcodesthatwere
setupbeforethereviewwascompiled,forexample,theplaceofthecasestudies,methods
applied,objectives,projectdescriptions,etc.[11].Istartedanalyzingthedocumentsand
completedthecategorysystembasedonthematerial(inductive)[17].Thesecodeswere
rathercontent‐related.Afterthefirsttenpapers,thecodesystemseemedsaturated;itdid
notgrowextensivelyfromthatpointon.Consequently,Icheckedthesefirstpapersagain,
whichshouldbeperformedafterhavingatleast10%ofthematerialcoded[18].Apart
fromthat,Ialsoworkedwithmemos,whichmeanttakingnotesduringtheentireprocess,
andlaterusedthesethoughtsfortheanalysis[12].Iusedthecodesinordertodefine
overarchingthemesamongthedocumentsandalsotodrawcomparisonsbetweenthetext
segments[19].Inthisprocess,Ideductedgeneraldescriptions,alsoknownasabstraction
“throughgeneratingcategories”[20].
3.Results
Referringtothefindings,thispapercontainsbothaquantitativeandqualitativeap‐
proach.Firstly,aspectssuchasthepublicationframeworks(yearofpublication,medium,
placesofthecasestudies,etc.)wereassessedusingdescriptivestatistics(Section3.1).Sec‐
ondly,Igatheredthestudies’conceptsandplaces(Section3.2),ontheonehand,andover‐
archingtopics[13],linesofdiscussion,aswellasdifferencesandsimilaritiesbetweenthe
studies[11],ontheotherhand(Section3.3).
3.1.BibliographicAnalysis
Thebibliometricanalysisexploresthedocumentsincludedfromaquantitativepoint
ofview[21].Idosoinadescriptivewayandputthefocusonthetypesofpublications,
thegeographicalplaceofthecasestudies,andthetopicsnamedinabstractsandkey‐
words.
3.1.1.Publications
Researchonmegaproject,gentrification,andtourismisadynamicfield,withacon‐
siderableincreaseincontributionsduringthelastfewyears.Thisgrowthsetinafter2010.
Between2011and2021,85%ofallthestudiesincludedwerepublished.Indeed,similar
evolutionshavebeenobservedinotherliteraturereviews,forexample,oneaboutgentri‐
ficationresearch[22].Thismightbelinkedtothegeneralincreaseincontributionsinthe
fieldofgentrification.Thisgrowthmightbetracedbacktotheimpactsof2008′sfinancial
crisis.Indeed,researchershavearguedthatlarge‐scaleurbanprojectswereusedinthe
crisis’aftermathtopromotegrowth[23,24].Asimilarlogicisobservedwithregardto
tourism,forexample,inSpanishcities[25].Thisprovesthetopicalityofthesephenomena,
particularlyagainstthebackgroundofthecurrentCOVID‐19crisis.Duringthelasttwo
decades,2019standsoutmost:21%ofallthestudieswerepublishedinthisyear[26].The
searchenginesconsulteddidnotfindcontributionspublishedpriorto2002.Ofcourse,
thisdoesnotnecessarilymeanthatthephenomenondidnotoccuruntilthen.Rather,it
indicatesthatthekeywordsproposedinthisreviewdidnotaddressolderstudies,which
showsanotherlimitationofmyapproach.
Comparingtheauthorshipsofthetextsrevealedaquitebalancedresearchlandscape,
evenwhencomparedtootherreviewsonneighboringtopics[22].Therewasonlyone
author(Doucet)whoappearedthreetimesinthereview[27–29].Fiveauthorshadtwo
Sustainability2021,13,128275of23
records.Onthecontrary,avastmajority—morethan80%—waswrittenbyauthorswith
onlyonestudy.
Withregardtothetypeofpublication,83%ofalltherecordsarepapersinscientific
journals,only17%arebookchapters(Figure2).Aboutone‐thirdofthesepapers(64%)
werepublishedinjournalsthatonlyoccuronceinthereview.Again,thisunderlinesthe
diversityofthefield,asthereare40differentjournalsintotal.Furthermore,journalspos‐
sessarangeofimpactfactors.Althoughaboutone‐fifthofthejournalsarenotlistedon
theWebofScience,thereisalargeshareofcontributionswithlowerfactors(35%under
2.0),andaconsiderablesharewithahighfactor(28%over4).
Figure2.Detailsonincludedpublications.Note:impactfactor(right)onlyreferstojournalpapers.
Ialsoreflectedonwhichofthesearchenginesprovidedthebestresults.Figure3
revealsthatGoogleScholar,ProQuest,andUniversityLibrary#1foundlargesharesof
thetotalnumberofrecords.Moreover,thedatabasesperformdifferentlywhenitcomes
toefficiency,i.e.,theshareofrecordsincludedinthereview.WhileGoogleScholar,Uni‐
versityLibrary#1,andtheWebofScienceevenslightlyincreasedtheirshareinthefinal
review,ProQuest,UniversityLibrary#2,andSocIndexdecreased.Intotal,theWebofSci‐
encehadthemostefficientperformanceofall,asithadahitrateof16%.GoogleScholar’s
hitratewasonly8%;however,itfoundthelargestnumberofstudies,whichstillcontrib‐
utessignificantlytothisreview.Norrisetal.drewthesameconclusionintheircompara‐
tiveanalysisofdifferentsearchengines,namelythatGoogleScholarperformsthebest
[30].However,otherauthors[13]andFigure3showthatusingavarietyofsearchtools
contributessignificantlytofindingadiversesetofrelevantdocuments.
83%
17%
Not listed on Web of Science
Imp a ct Fa ct or < 2 .0
Imp a ct Fa ct or 2.0 < 4.0
Impact Factor 4.0 < 6 .0
Imp a ct Fa ct or > 6.0
Paper in Journals
Type of Publication Impact Factor
Book chapters
35%
22%
20%
15%
8%
Sustainability2021,13,128276of23
Figure3.Hitsondatabases.Left:totalrecords,beforescreening.Right:recordsincludedinthelit‐
eraturereview,afterscreening.
3.1.2.PlacesandProjects
Thisparagraphlooksatthegeographicalscaleofstudiesincludedinthereview.
Therearetwodimensionstothat.Iwillfirstinvestigatethecitiesandprojectsthatare
citedwithinthedocumentsofthisreview.Theaimhereistoidentifythemostvisible
megaprojectsworldwideandtheirspatialdistribution.Secondly,Iwillchangetheper‐
spectiveandfocusoncitiesandprojectsthatserveascasestudiesintheliterature.
Figure4revealsthevisibilityoflarge‐scaleurbanprojectswithintheacademicdis‐
course.Morethanone‐quarterofalltheprojectscited(26%)arelocatedinMediterranean
countries,wheretourismtypicallyplaysanessentialroleinurbandevelopment.The
mapsalsoshowthatcountriesoftheso‐called“globalnorth”accountfortwo‐thirdsofall
theprojectsnamed.AlthoughAsiancountries(14%)andtheGulfregion(11%)haveim‐
portantshares,otherareas,suchasSouthAmerica(2%)orSub‐SaharanAfrica(1%),rarely
appear.
Sustainability2021,13,128277of23
Figure4.Thegeographiesofstudiesincludedinthereview.Thenumberofcitedprojectspercountry(bubbles)andnum‐
berofcasestudiespercountryinthereview(dots).Ownelaboration.
ThecountrieswithmostcitationsareSpain,theU.S.,andtheUnitedKingdom.In
particular,thecaseofSpainspeaksforitself.Asarelativelysmallnationwithonly14%of
thepopulationoftheU.S.,itisthecountrythatreachesthehighestnumberofproject
referenceswithinthisreview.ThisalsogoesfortheUnitedArabEmirates,acountrywith
barely10millioninhabitants,butaconsiderablenumberofcitationsbasedonAbu
Dhabi’sandDubai’smegaprojects.
Thisisalsoreflectedinthestatisticsonthecitiescited(Table1)—withLondon,Bil‐
bao,andBarcelonabeingthetopthreecitiesdiscussed,allofwhicharelocatedinEurope.
Themost‐referencedprojectsareBilbao’sGuggenheimMuseum,followedbyCanary
Wharf,London.
Table1.Mostcitedcitiesandprojectswithinthereview.Ownelaboration.
MostCitedCitiesMostCitedProjects
#CityHits#ProjectHits
#1London25#1Guggenheim,Bilbao16
#2Bilbao22#2CanaryWharf,London8
#3Barcelona16#3Docklands,London5
#4NewYork15#4HafenCity,Hamburg4
#5Dubai11#5InnerHarbor,Baltimore4
#6Istanbul9#6LaDefense,Paris4
#7AbuDhabi9#7AtlanticYard,NewYork3
#8Paris7#8GoldenHorn,Istanbul3
#9Shanghai7#9Guggenheim,AbuDhabi3
#10Singapore6#10PudongDistrict,Shanghai3
Apartfromthecitedcities,Ialsoexploredwhichcitiesareanalyzedbymeansofcase
studieswithinthereview.Intotal,78projectsarediscussed.Almosthalfofthisgroup
(49%)isstudiedatleasttwotimes,therestarestudiedonlyonce.Again,thestatistics
Sustainability2021,13,128278of23
revealthestrongroleoftheUK,theU.S.,andSpain(Table2).Althoughitwasthecity
mostcited(Table1),Bilbaodoesnotdominatetheranking(Table2).Incontrast,itisRot‐
terdamandtheNetherlandsthatreachthetoppositionsinbothtables,butneitherofthem
belonginthetop10listofthecitedprojectsorcities.Here,thedominanceofcasestudies
inthe“globalnorth”isevenmoreobviouscomparedtothereferencesmade:70%ofthe
casestudiestakeplacethere.
Table2.Citiesandcountriesanalyzedbymeansofcasestudieswithinthereview.
CitiesAnalyzedinCaseStudiesCountriesAnalyzedinCaseStud‐
ies
#CityCountryHits#ProjectHits
#1LondonUK4#1Spain11
#2RotterdamTheNetherlands4#2UK10
#3ValenciaSpain4#3USA6
#4BarcelonaSpain3#4TheNetherlands5
#5BilbaoSpain3#5China4
#6HongKongChina3#6Germany4
#7MexicoCityMexico3#7Mexico4
#8BelgradeSerbia2#8Turkey4
#9DohaQatar2#9France3
#10GlasgowUK2#10Qatar3
Figure5insinuatesarelationshipbetweenthenumberofcasestudiespercountry
includedintheliteraturereview,ontheonehand,andthenumberofcitedreferencepro‐
jects,ontheotherhand.Thisservesasacontrolproxyfortherepresentativenessofthe
casestudiesselected.Forexample,thereisnocountrywithmanycitationsthatdidnot
alsoappearinacasestudywithinthereview.Thecountrieslocatedabovethetrendline
haveacasestudysurpluscomparedtothosecountriesbelowtheline.Thismeansthatthe
U.S.ortheUnitedArabEmirates(UAE),forexample,arecitedquiteoften,althoughthere
arenotasmanycasestudiesinthesecountriescomparedtoothers.Thissuggeststhat
projectssuchasBurjKhalifa(Dubai)orAtlanticYards(NewYork)havehighvisibility
withintheacademicdiscussion.Contrarily,megaprojectsinTheNetherlands,Germany,
andtheUK,appearinarelativelyhighnumberofcasestudiesbuthavelessvisibility
withintheacademicdiscussion.Figure5alsoprovesthepolarizedsettingofthecasestud‐
ies.Spain,theUK,andtheU.S.areaheadofallothercountries,ontheonehand,while
thereisalargegroupofcountrieswithonlyoneortwocasestudies,ontheotherhand.
OnlytheUAEassumesamedialposition.
Sustainability2021,13,128279of23
Figure5.Megaprojectspercountry.Referencestoothercasesvs.projectsanalyzedincasestudies.Ownelaboration.
3.1.3.KeywordsandAbstracts
Exploringkeywordsandabstractsquantitativelyisafirststeptoapproachthecon‐
tentsoftherecordsincluded.Bothtypesofdatarevealwhichkeytermsandconceptsare
linkedtothetexts—fromtheauthors’perspectives.Inthispaper,Iassesstheseaspectsin
ordertoextractcategoriesforthequalitativeanalysis(inductive)andgatherfirstimpres‐
sionsofrelevantresearchtopics.
Withregardtokeywords,theterm“urban”isusedmost.Outofthe699keywords
included,itappeared65times,andalmosttwo‐thirdsofalltherecordsuseit(Table3).I
explainthishighfrequencywiththemultiplemeaningsoftheterm.“Urban”isunder‐
stoodasthespatialscale,wheretheresearchedphenomenatakeplace.Apartfromthat,it
alsoentailsaconceptualmeaning,andiscombinedasanadjectivewithotherterms,such
as“renewal”or“project”.
Table3.Statisticsonkeywordsused.Ownelaboration.
RankKeywordFrequencyRelativeFrequency
[%]Documents
Shareof
Documents
[%]
1Urban659.33465.4
2Planning233.32038.5
3Social131.91223.1
4City142.01121.2
5Development121.71019.2
6Regeneration111.61019.2
6Sciences111.61019.2
7Waterfront101.41019.2
8Megaprojects91.3917.3
9Public91.3815.4
10Gentrification81.1815.4
11Redevelopment81.1713.5
12Politics71.0713.5
13Studies91.3611.5
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14Geography71.0611.5
14Renewal71.0611.5
15Cities60.9611.5
15Mega60.9611.5
15Project60.9611.5
15Regional60.9611.5
15Space60.9611.5
||||||
18Tourism40.647.7
24Brownfield20.323.8
Interestingly,thesecondmostimportantkeywordis“planning”(usedby39%ofthe
records),whichindicatestheimportanceofthisfieldasaresearchperspective.Thefirst
place‐relatedkeywordis“waterfront”(rank7),whichindicatestherelevanceofconver‐
sionareasnearblueinfrastructuresinone‐fifthofthetextsincluded.
AnotherstrikingfactisthatthekeywordsIusedinsearchenginestofindtherelevant
literature(seeSection2)playminorrolesinTable3.Theterm“brownfield”onlyoccurs
in4%ofthedocumentsandtourismin8%.Outofallthekeywords,“gentrification”
reachesthehighestposition(rank10).Thisobservationinsinuatesthatgentrification,
tourism,andmegaprojectsmightindeedbetheconceptualframeworkofmanystudies,
whileotherspecificaspectsareresearchedindetail.
Regardingthekeywords,IalsousedtheVOSviewertoanalyzetheappearances(Fig‐
ure6).VOSviewerisaprogramdesignedtovisualizebibliometricitems[31].Thevolume
ofthelabelsisdeterminedbytheweightofeachitem.Moreover,thealgorithmclusters
theitemsaccordingtotheirco‐occurrence.Thismeansthatclosenessrepresentsstronger
relatedness[32],butthelinesalsorepresentlinksbetweenthekeywords.
Sustainability2021,13,1282711of23
Figure6.Termmapshowingtheco‐occurrenceofkeywordsused.Top:Networkclusteredbythematicgroups.Bottom:
Networkclusteredaccordingtotheiryearofappearance.OwnelaborationbasedonVOSviewer(version1.6.17)[32].
Forthistermmap,316keywordswereusedintotal.ContrarytoTable3,thekey‐
wordswerenotsplitup,whichmeansthatforexample“urbanplanning”wasnotdivided
into“urban”and“planning”.Theminimumnumberofappearanceswasthree,which
meansthat17keywordsmetthethreshold.Theclustersdonotmatchperfectlyfroma
thematicperspective,astheyaregeneratedautomatically.However,Iusedthismapasa
Sustainability2021,13,1282712of23
complementarytooltoenrichtheanalysis.InthetopmapinFigure6,threethematicclus‐
tersareidentified.Clusterone(red)mainlycontainsstudyareassuchassocialsciencesor
urbanstudies,showingthebackgroundofthedocumentsusedinthereview.Clustertwo
(black)isalarge,butratherdispersegroupthatcontainsplaces(cities),andalsoprocesses
suchasurbanrenewalandurbanplanning.Clusterthree(blue)onlyincludesthreecon‐
cepts,namely,megaprojects,gentrification,andurbanregeneration,representingthose
studiesthatanalyzeprojectsinthecontextoftheircity’sdevelopment.
ThesecondmapdisplayedatthebottominFigure6containsthesamekeywordsbut
theyarereferencedbytheiryearofpublication.Withonly66documentsincluded,the
datasetisrelativelysmallandrepresentativitymustbequestioned.However,thismap
indicatesashiftintheusageofterms.Theolderkeywords(around2010)mainlycontain
disciplines(urbanstudies,socialsciences),whiletheyoungerkeywords(around2014)
focusonobjectsorprocesses(megaprojects,cities,urbanplanning).Thistrendmightbe
confirmedforlargersamplesinfutureresearch.
Figure7visualizesthequantitativeanalysisoftheabstractsandcontainswordsthat
occurredatleasttentimes.Thesewordsareclassifiedintothefollowingfivegroups:
stakeholder,process,scale,concept,andproject.ComparedtotheVOSviewermapabove,
IfindFigure7lessconceptual,buteasiertointerpret.Hence,Iusedtheseumbrellaterms
tobeginconstructingthecategorysystem,onwhichthefurtherqualitativeanalysiswas
based(seeSection3.3.).
Figure7.Wordcloudbasedonallabstractsincludedinthereview.Ownelaboration.
3.2.Concepts
ApartfromthemorequantitativeaspectsdescribedinSection3.1,Iwantedtocover
theconceptualaspectsofthisreview,referringtomethods,researchobjectives,thetheo‐
reticalframe,andthelocationoftheprojectscitedwithinthecities.
3.2.1.Methods
Iwillfirstlyillustratewhichconceptstheincludedstudieshave.Thereisaclearma‐
jorityofcasestudies(Figure8),whichaccountforalmost82%ofthetextsanalyzed.Con‐
trarytothat,onlyabout10%aremeretheoreticalcontributions.Thisindicateshowthe
discussiononmegaprojects,gentrification,andtourismhasastrongproject‐relatedap‐
proach.Itracedthisbacktotheemergingcharacterofthisfieldofresearch(Section3.1.1).
Itseemslogicalthat,inaninitialphaseofthediscussion,researchersexplorethephenom‐
enabymeansofcasestudies,whilethetheoreticbackgroundisyettoevolve.However,
35%ofallthecasestudiesapplyacomparativeapproachincludingprojectsinatleasttwo
differentcities,whichseemstobethefirststepingeneratingconceptualideas.
Figure8alsoshowsthathalfofthecasestudiesrelyonqualitativemethods.Only
11%ofthecasestudieshaveaquantitativeapproach.About26%usedocumentanalyses,
Sustainability2021,13,1282713of23
butonly6%applyitasasinglemethod,therestcombineitwithotherinstruments.In
fact,conductingbothdocumentanalysisandinterviewsisthemostcommonapproachto
thecasestudies—almostone‐fifthchoosethiscombination.About28%ofthestudiesdo
notspecifynordiscusstheirmethods.
Figure8.Methodsandconcepts.Left:conceptsofallincludedstudies.Right:methodsappliedincasestudies.Note:per‐
centagevaluescannotbeaddedbecauseacasestudymightuseacombinationofmethods.Ownelaboration.
3.2.2.Objectives
Scanningthroughtheresearchconceptsofthestudiesselected,Iidentifiedthefol‐
lowingthreegroupsofobjectivesthataretypicallypursued:descriptions,evaluations,
andreflections.Theseobjectivesoverlapinsomestudies,inothers,theyoccurseparately.
Firstly,ascasestudiesrepresentthemajorityofcontributionsinthereview,itisnot
surprisingthatonemainobjectiveistodescribetheprojects.However,emphasisvaries
strongly.Manystudies“describeandanalyzethetransformation”[33]provokedbylarge‐
scaleprojects.Furtheraspectsrangefromplanningprocesses[34],stakeholders[27],and
motivations[35],tothedesignofmegaprojects[36].
Secondly,thereisanimportantbodyofliteraturethataimstoevaluatetheimpacts
oftheseprojects.Byplacingthemegaprojectsintotheircities’contexts,theresearchfocus
isput,forexample,on(socialandenvironmental)justiceandpublicprotests.Inthisre‐
spect,someresearchersexplicitlyexploretherelationshipbetween“urbanpublicpolicy
andgentrification”[37].Furthermore,theexpectedpositiveimpactsarealsoresearched.
Theso‐called“trickle‐downeffect”isanarrativethatmanymegaprojectsprovide,butit
isalsoonethatisquestionedbyscholars[38].
Thirdly,studiescriticallyreflectnotonlytheprojectsbutalsotheframesandcondi‐
tions,wheresuchlarge‐scaledevelopmentsemerge.Here,megaprojectsaredescribedas
“localproductionsoftheglobal”[39],referringtoglobalizedtrendssuchastheentrepre‐
neurialturn[40,41],theneoliberalurbanhegemony[42],inter‐citycompetition[43],or
financialization[3].
3.2.3.TheoreticalFrame
Analyzingthetheoreticalframesusedbythestudiesisanotherwaytoapproachthe
review.Thereisalargevarietyoftheoriesusedandnotallthestudiesclearlyindicatethe
frametheyhaveapplied.Table4summarizesthefourmostimportantframesused.
Firstly,thetheoreticalumbrellaconceptwiththemostcontributionsis,byfar,neolib‐
eralization.RepresentativessuchasMoulaert(55%),Harvey(55%),orSwyngedouw
(59%)arecitedamongmorethanhalfofthedocumentseach.Withinthisframe,Iidenti‐
case studies other concepts
theoretical discussions
0
10
20
30
40
50[%]
qualitative methods unclear document analysis quantitative quantitative &
qualitative
50.0
81.8
7.6
10.6
27.8 25.9
11.1
3.7
concepts methods used in case studies
Sustainability2021,13,1282714of23
fiedthelargestvarietyofaspects.Thelinkagebetweenmegaprojects,tourism,andgen‐
trificationisassociatedwithurbanentrepreneurialism[27]andprivatization[44],the
globalcompetitionbetweencities[45],orformsofgovernance[23].
Secondly,asmaller,butstillimportantframeiscultureandimage,withmainauthors
suchasSharonZukinandRichardFlorida.Botharecitedbyaboutone‐quarterofthe
documents.Thestudiesthatrefertothisframeinterpretlarge‐scaleprojectsasameansto
re‐shapeor“re‐imagine”[36]thecity,orhighlighttheessentialroleofcultureinurban
development[40].
Urbanjusticeisathirdframeusedbythestudies,whichexplores“questionsthat
pertaintothegeographicscaleatwhichjusticemaybeproduced,thenatureofeconomic
versusotherformsofinjustice,theuniversalityoftheconcept,andtheimportanceofpro‐
cessversusoutcomes”[34].WithauthorssuchasPeterMarcuse(16%)andEdwardSoja
(11%),theseconceptsareratherspecificandnotappliedasoftencomparedtoothercon‐
cepts.However,thisframecontainssomestrongandvisibleaspectssuchasenvironmen‐
taljustice[46]orgentrificationasaquestionofsocialandspatialjustice[47].
Fourthly,anotherperspectivedealswithplanningandpolicyfromaverypractical
pointofview.Here,large‐scaleprojectsareintegratedwithinurbanprogramstostopur‐
bandecline[48],initiatebrownfieldregeneration[49],or“makecitiescompetitivewith
suburbs”[50].
Table4.Importantframesusedinstudiesandtheirsubtopics.Ownelaboration.
FrameAspectsSources
Neoliberalization
Competition[45,51]
Entrepreneurialism[27,52,53]
Privatization[44]
Governance[23]
Worldingcities[54]
Neo‐Gramscianperspective[55]
Post‐politicsandpost‐democracy[56]
CultureandImage
Urbanimageries [57]
“re‐imagining”or“re‐imaging” [36]
“brandingcampaigns” [58]
Creativecities[40]
Landscape[46]
Culturalregeneration [59]
(Urban)Justice
Distributivejustice [50]
Gentrification[47,60]
Environmentaljustice [46]
Socialjustice [34,61]
PolicyandPlanning
Revitalization [38]
(Inner‐city)regeneration[62]
(Brownfield)regeneration[2,49]
Redevelopment [50]
Anotherpartofunderstandingthetheoreticalframeistoanalyzethekeytermsused
todescribetheprojects.Ibeganthisliteraturereviewbydetermining“megaprojects”,
“large‐scaleurbandevelopmentprojects”,and“brownfield”askeytermsandusedthem
Sustainability2021,13,1282715of23
tosearchforliteratureindifferentdatabases.Itisrevealingtoseehowthefinal66docu‐
mentsactuallyusetheseterms.Figure9revealsthataminorityofrecordsappliesonly
oneoftheconcepts.Onthecontrary,halfofthetextsuseboth“megaproject”and“large‐
scaleurbandevelopmentproject”synonymously.About12%evenadd“brownfield”asa
thirddescription.Comparingthethreetermswitheachother,“brownfield”istheonethat
islessused.Apartfromthat,only14outofthe66studies(21%)explicitlyofferadefinition
ofwhattheyunderstandundertheconceptsapplied.
Figure9.Conceptterms.Ownelaboration.
3.2.4.Projects’LocationswithinCities
Ialsotaggedeachcasestudywithregardtotheircity‐specificlocation.Almosthalf
ofallthelocationtagsbelongtothecategory“waterfront”(44%),whichindicatesthelarge
shareofmegaprojectsrelatedtoblueinfrastructures.About31%ofthetagsareinthe
category“brownfield”.Thisisquitesurprisingbecauseitprovestherelevanceofsuch
conversionprojectsfortheresearchinterestpresentedinthispaper,ontheonehand.Con‐
versely,Figure9andTable3clearlyshowhowthespecificterm“brownfield”onlyplays
aminorroleasakeywordorconcept.Thismeansthatthereisagapbetweentheactual
relevanceofconversionprojectsandthelabelingofsuchasbrownfieldsites.Apartfrom
that,therearealsoothersitesnamed,suchasneighborhoods(17%),anddevelopmentson
thegreenfield(7%).
Comparingthesefindingstotheliteraturerevealsthatotherscholarshaveobserved
asimilardevelopment.DiazOruetaandFainstein[6]evenspeakofanewgenerationof
megaprojectsandseeintheirlocationonwaterfrontsoroldmanufacturingareasthemain
elementsoftheirdefinition.Theyaddtothediscussionthatbuildingtheseprojectson
derelictlandincreasespublicacceptancebecause,apparently,nooneisdisplacedfrom
there[6].Hence,thiscanbeinterpretedasastrategypromotedbytheprojects’initiators
toavoidprotest[43].Italsogoesbacktotheongoingeconomictransitiontowardthepost‐
industrialcity,whichleavesmanyformerindustriallyusedplaceswithoutafunction[63].
3.3.TopicsandContents
Thissectiondigsdeeperintothecontentsdiscussedbythedocumentsincludedin
thisliteraturereview.Idosobypresentingthecodesystem,andthreeselectedtopics,
namelygentrification,tourism,andplanning.
Table5containsaselectionofcodes,whichhelpstogiveafirstoverviewofthemost
relevantandoverarchingtopicsdealtwith.Thetabledoesnotshowconcept‐relatedcodes
suchasmethods,projects’descriptions,orobjectives,itratherfocusesoncontents.
Sustainability2021,13,1282716of23
Table5.Codesystemwithmostrelevanttopic‐relatedcodesandreferences.Ownelaboration.
Project‐Related
Information
0Motivations55Planning42
Description(contents) 143Revitalization/regeneration6Participation25
Numbers/statistics17Power3Transparency13
Scale41Economicreasons33Concepts9
Costs25Image/marketing48Public–privatepartnerships23
Discussionofresults98localreasons13Stakeholders53
Successfactors27Trickledown5Roleofthestate51
Positiveaspects29Accesstothespace8Problems8
Negativeaspects110 Financialmodel24
Justice40OtherTopics 0Reactions10
Socialissues7Tourism100Themedia11
Segregation4Localconditions56Protests39
Gentrification81Architecture41
Industrial
Gentrification
3Lessonslearnt
42
Greengentrification8Sustainability
25
Neoliberalism22
History18
SomeofthecodesIhadalreadypreparedbasedonpreviousknowledgeandwhat
wastobeexpectedbasedonotherliteratureandtheanalysisofkeywordsandabstracts
(project‐relateddata,planning,justice).Additionally,manysubcategorieswerebuilton
thematerial.Forexample,71%ofallthestudiesexplainthediversemotivationsforthe
megaprojectsdescribed.ThisisacategorythatIdidnotexpect.Nextto“planning”(80%)
and“justice”(79%),itisevenoneofthelargestcategories,atleastconsideringthenumber
ofdocumentswheretheyappear.
3.3.1.Gentrification
Large‐scaledevelopmentprojectscanproducegentrificationinmultipleways,and
thisalsoreflectstheliteratureanalyzed.New‐buildgentrificationisindeedoneofthe
mostcommonphenomena,whichoccursifprojectsaredevelopedonaformerlyunused
area[29].Apartfromthat,suchdevelopmentsobviouslyinfluenceadjacentneighbor‐
hoods.Thismightoccurbytheintentionoftheproject’sinitiators,suchasintheValencia
Plan[40].Itcanalsooccurunintended,iftherearestrongmarketforces,suchasa“self‐
financingimperative”[64]andno“carefulpublicinterference”againstgentrificationis
proposed[65].
Inanycase,projectsthatlackspatialandfunctionalintegrationwithinthedistrict
willprovokeastrongdisparityandhighpricedifferences[66].Moreover,newfacilities
suchas“shoppingmalls,parks,luxurioushotels,andconventioncentres”[1]arepartof
aprojecttoattractothersocialgroups,suchastourists.Thisisalsoobservedingreen
gentrificationprocesses[67],whichterritorialize“thosespacesasinvitingtocapital,elites,
andtourists”[68].WithexamplessuchastheAnacostiaRiverinWashingtonD.C.[34]or
Medellín’sGreenbelt[68],thediscussionongreengentrificationisquiteyounganddy‐
namic[69].Greengentrificationaccountsfor10%ofallthecodeswithinthegentrification
categoryandprovestobearelevantonebecauseitexemplifieshowenvironmentalup‐
gradingduetomegaprojectsdoesnotalwaysbenefitallneighbors.
Marcuse’sconceptofexclusionarydisplacementhasbeenappliedtothisdiscussion,
becausethenewhousingunitsbuiltinsuchmegaprojectsarerarelyaccessibletogroups
Sustainability2021,13,1282717of23
withlessincome[44].Megaprojectsalsoproduceafearofdisplacementduetotheex‐
pectedneighborhoodchanges[44].However,theexampleofRotterdam’sKopvanZuid
showshowgentrificationhasnotspread“farbeyonditsboundaries”[28];therefore,the
processisnotaself‐fulfillingprophecyperse.
Furthermore,thegroupofdisplacedpersonsismoreheterogeneousthanonewould
supposeatfirstglance.Itisnotonlyinhabitantsevictedfromtheirhouses,butalso“driv‐
ers,informalvenders,andoccupants”fromthepublicspaces[70].Insomecases,even
industriesare(actively)evictedtoreplacethemwithservice‐orientedfunctions.Thispar‐
allelismofdeindustrializationandupgradingisobservedinBerlin[71],wherethecity
centerisintendedtobeshiftedtotheeast.Similarprocessesoccurifmarketforcesdrive
industrialusesfromthewaterfront,suchasinHongKong[72]orinSeoul[73].
Apartfromthat,injusticeisnotonlyseenasaproductofdisplacement.InTurkish
cities,low‐incomegroupsweredisplacedfromtheir(informal)settlementsbutwereof‐
ferednewapartmentswithinthemegaprojects,whichappearedtobeamovetointegrate
localinhabitants.However,theywerealsoincorporatedinto“agloballyarticulatedmort‐
gagemarketwhichmeansalong‐termdispossessiontotheirlabor”[55].
Insummary,therelationshipbetweenmegaprojectsandgentrificationiscomplex.It
isworthnotingthattheliteratureincludedinthisreviewrathertakesananalyticalpoint
ofview,eitherdescribingorexploringtheseprocesses,ratherthanproposingsolutionsto
theproblem.Gentrificationisnotonlytoberegardedasathreattoaneighborhood’ssus‐
tainability,butevenendangerstheactualgoaloftheprojects:Itmightphysicallyregen‐
erateadistrictbutdoesnotultimatelycontributetothelocalpeople’swellbeing[74].If
so,gentrificationcanbecomeatinderboxevenforprojects’developers,becauseitfuels
protestagainsttheplans[1].
3.3.2.Tourism
Tourismisstudiedfromvariouspointsofviewintheliterature.Whilemoststudies
confirmtourismasonekeydriverformegaprojects,onlysomeexploretheconflictsthat
thegrowingtourismbringsabout[75].
Thischangeswithregardtotheinitiators’pointofviewabouttheirmegaprojects.In
mostcases,thepredominantnarrativeistoattractmoretouristsorevenpositionthecity
onthetourists’consciousnessbymeansofmegaprojects.Inthisliteraturereview,thereis
oneexception:InthecaseoftheBarcelonamodel,megaprojectswerealsointendedto
diversifytheeconomytobelessreliantonmasstourism[3].
Theauthorsexplainthehighattractivenessoftouristfunctionswithitsprofitability.
Apartfromluxuryresidences,offices,andshoppingfacilities,tourism(e.g.,hotels)isone
ofthemostprofitableusesinmegaprojects[76],letalonetheadditionalbenefitsoftour‐
ists’spendinginthecity.Thequestionisalso,whatroletourismplayshistoricallyinthe
region’sorcountry’seconomy.Insomecases,“statesusetourismtodefinenationaliden‐
titythroughsymbols,attributes,andplaces,anddevelopanimportanturbaninfrastruc‐
turetoassertglobalrecognition”[77].Usingtheglobalvisibilityoflarge‐scaleurbande‐
velopmentprojectsisthusalogicalconsequence.
Toaddressthisvisibility,thereareatleasttwoformsinwhichtourismformsapart
ofmegaprojects.Firstly,therearethoseprojectswheretourismisoneelementamongoth‐
ersinamixed‐useprogram.ThevarietyofexamplesreachesfromBilbao’sAbandoibarra
[64]toKingsWaterfrontinLiverpool[49]ortheBelgradeWaterfront[57].
Secondly,insomemegaprojects,tourismisthemainfunction.Again,therearedif‐
ferentformsofsuchprojects,forexample,theAmerica’sCupin2007inValencia,which
clearlyadvocateshigh‐endtourism[56].Verypopularexamplesarethespectacularmu‐
seums(Guggenheim,Bilbao)[37]ortheoperahousesinOslo[35]andSantaCruzdeTen‐
erife[78].Such“spectacular”buildings“tendtoconfirmonecity’scosmopolitanorienta‐
tionoratleasttourism‐friendlyidentity”[58]andrevealtheconnectionbetweenglobal
imageandtourism.
Sustainability2021,13,1282718of23
Apartfromculturalflagshipprojects,tourismcanbepromotedinmanyotherways,
allofthemconcentratedintheexampleofCostadelSol,Málaga[75].Inthiscase,acom‐
binationofdirectlarge‐scaleinvestmentintoaccommodation,theregenerationofthehis‐
toriccenter,andawaterfrontregenerationwasproposed.
Itisparticularlythelatterexample,namely,waterfrontprojects,wheretourismfunc‐
tionsarepromising,asproveninMelbourne:“thekeytoitssuccesswasthatthedevelop‐
mentprovidedanorth‐facing,sunnyexposureonthewaterfront,withabrand‐newpan‐
oramaofthecityskyline”[33].
Withregardtotheimpactoftourismontheconceptofmegaprojectsandlateron
urbandevelopmentingeneral,theliteratureincludedinthisreviewassumesarathercrit‐
icalposition.Thisisbasicallybecauseofthe“competingdemandbetweenaplacefortour‐
ismandaplaceforlocalpeople”[72].Inmanycases,theneedsofthelocalpeopleare
neglectedcompletely.Thisisdiscussedbytheconceptof“containertourism”,whichre‐
ferstospectaculararchitecturethatisemptyofcontents[51].Inmoreintegrativecases,
thereisatleastsomeheritageconservation,whichhasbothavalueforthelocalidentity
andisalsoattractivefortourists[69].Preservinglocalpeculiaritiesisaneffectivestrategy,
giventhefactthatfromthetourists’perspective,itcanbedisappointingtofindjustan‐
otherglobalizedurbanformintheirtraveldestination[69].
Overall,theliteraturecitedinthisreviewdocumentsthestrongbeliefthatgovern‐
anceandplanningbasedonlarge‐scaleinfrastructureswouldfosterbothtourismandthe
imageofthecityitself[40]—akeyassumptionundertheentrepreneurialturn.
3.3.3.Planning
AthirdtopicthatIwilldiscussisplanning,asithasobviouspracticalrelevance.In
general,Iobserveacriticalperspectiveinthesedocuments.Thisisbecauseplanninglarge‐
scaleurbandevelopmentprojectsposessevereproblemstotheexistingplanningframe‐
work[24].Apartfromthat,mostoftheobservedplanningprocessesareseenas“darkand
secret”[1],where“speed”and“urgency”[79]reign,althoughthesearenotgoodplanning
principles.
Whenanalyzingplanningprocessesinmegaprojects,thestudiesincludedplacea
strongemphasisonstakeholders.Thissub‐categoryaloneaccountsfor45%ofallthe
codesincludedinthecategory“planning”.Therefore,Iwilldescribesomegeneralaspects
andlaterfocusonpublic–privatepartnershipsandtheroleofthestate,whichareboth
highlydiscussedissues.
Animportantstepthatmanystudiesproposeistodisentanglethenetworkofstake‐
holdersinamegaproject,as“acomplexsetofpowerrelations”[69].Thereisaneedtodo
sobecausetheserelationsareregardedascomplexduetothenon‐transparentinterna‐
tionallinksofcapitalandpower[57].Forexample,personalrelationsandnepotismare
describedascommonproblems[23].Morethanhalfofthestudiesalsorefertothe“elite”
asafuzzyandpartiallyhiddengroupthattriestoreachitsinterestsbymeansofamega‐
project[34,70].Itisparticularlythiselitethathasbeeninfluencedbyveryvisibleandap‐
parentlysuccessfultransformationsduetomegaprojects[1].Contrarily,thestudiesdonot
somuchfocusoncivicgroups,neighborhoodrepresentatives,orotherassociations.This
isprobablybecausethesegroupsareneitherinchargenordotheycontributetotheun‐
democraticcharacterofprojects.
Instead,theoutstandingfocusisplacedonpublic–privatepartnershipsasthepre‐
vailingmodelbehindmegaprojects[6].Somestudiesexplainthemotivationsforthis
model,whichservestomobilizeactorsapartfromgovernmentalentitiesbyentrepreneur‐
ialstrategies[27].Othersfocusontheimplicationsofpublic–privatepartnerships,suchas
DiazOruetaandFainstein[6].Theycriticizethattheproducedspacesoftenputprofits
firstandurbanitysecond.Moreover,planningrulesaremodifiedtomakethemfitwith
logicfromtheprivatesector[57].Thishasledto“decentralizedformsofgovernance[…]
whilerelyingonstate‐issuedexceptionalrules”[54].Insomecases,megaprojectsareeven
Sustainability2021,13,1282719of23
usedtointroducepublic–privatepartnershipstothecityonalargescaleasthenewform
ofgovernance[66].
Apartfromthat,theauthorsalsocriticallyinvestigatetheroleofthestate.About49%
ofallthecodesdealingwithstakeholdersconcentrateonpublicdecision‐makers.Thestate
isseenas“akeyarticulatorinspeculativecitydevelopmentschemes”[53].Despitethe
popularityofpublic–privatepartnerships,manyofthemegaprojectsarestate‐led.Thisis
notonlythecaseinautocraticsystems[57]butalsoinmoredemocraticenvironments[28].
However,itwouldbewrongtoassumethatthereisjustasingularstakeholderbehind
theterm“state”.Itrathermustbedifferentiatedbetweennational,regional,andlocalen‐
tities[57],orevenotherpublicbodiessuchasthearmy,portauthorities,etc.[69].This
turnsthestateintoahighlyrelevantbutcomplexaspecttostudy,asthepublicstakehold‐
ersoftenpursuecontradictinggoals[80].
4.Conclusions
Thisliteraturereviewsoughttosystemizetheexistingknowledgeabouttheinter‐
twiningfieldsofurbanmegaprojects,gentrification,andtourism.Despitethelimitsofthe
chosenprocedure(e.g.,limitedrangeofkeywords,focusonEnglish‐speakingdiscourse),
Iwanttohighlightthefollowingthreeaspectsthatthisreviewhasshown:
Researchinterest:Theareastudiedisanemergingfieldwithanumberofcontribu‐
tionsthatgrowsteadily.TheglobalnorthandcountriessuchasSpain,theUK,and
theU.S.dominatethediscussion.Journalsarethetypeofpublicationwheremost
discussionstakeplace.Studiesstronglyrelyonqualitativeapproachesormixed
methods
Format:Casestudiescontributesignificantlytothediscussion,whichemphasizesthe
existingknowledgeabouthowtoapproachmegaprojects,whichmethodstoapply
andhowtointerpretthem.
Contents:Withregardtocontents,topicssuchasplanning,motivationsbehindpro‐
jects,(social)justice,theimpactsonthecity,andreactionsinsocietyprevail.Halfof
thetextsrefertoauthorsrepresentingconceptsonneoliberalism,andaboutone‐
quarterdrawsontheoriesaboutcultureandimage.Contributionsfrompracticalper‐
spectivesrepresentaminority.
However,Iidentifythefollowingthreegapsintheliteraturethatfutureresearch
shouldtrytofill:
Methodologicalgap:Morethanone‐quarterofallthestudiesdidnotclearlyexplain
theirmethods.Thisisproblematicforthefollowingtworeasons:(1)Itreducesthe
qualityoftheresultsbecausethereadercannotunderstandhowthefindingswere
produced.(2)Italsomakesitimpossibletoreplicateresearchdesignsandthusvio‐
latestheprinciplesofgoodscientificpractice[81].
Transfergap:Fromamorepracticalperspective,itisnotclearatallhowtobring
existingknowledgeabouttherelationshipbetweenmegaprojects,gentrification,and
tourismtopolicymakersandstakeholdersinthecities.Thisisprovenbythegrowing
numberofcasestudies,showingthatnolearningprocessesaretakingplacebetween
theprojects.
Spatialgap:Fromaconceptualperspective,thereisaspatialgapwiththeglobal
northdominatingthediscussion.Hence,anunreflectedtransferofconceptsfromthe
globalnorthtothesouthmustbeavoided.Thelargenumberofstudiesthattake
placeinthenorthdealingwithhighlyvisiblemegaprojectseasilyoutweighsexam‐
plesfromthesouth.Ofcourse,newandemergingstudieswilltaketheexistingcon‐
ceptsintoconsideration,butnotreflectingonthelocalpeculiaritiesofeachphenom‐
enonwouldbeamistake(seeforexampleLópez‐Morales[82]foracriticaldiscussion
ofnorth–southtrajectoriesingentrificationresearch).
Onthatbasis,Idrawseveralconclusionsthatserveasguidanceforfurtherresearch.
Sustainability2021,13,1282720of23
Firstly,toadvancethediscussion,Iproposeaconceptualsharpening.Thisrefers,for
example,totheclearuseofkeywordssuchasmegaprojectsorgentrification,andalso
includestheirtransparentdefinitions.Thisisnecessarytoavoidsofteningtheexisting
concepts.Italsocontributestoaclearunderstandingoftheseterms,asitisclaimedinthe
neighboringdiscussionbetweengentrificationandtouristification[83].Regardingthe
highshareofcasestudieswithinthisdiscussion,moretheoreticalandconceptualcontri‐
butionsshouldcomplementthefield.Apartfromthat,byconceptualsharpening,Ialso
refertoprovidingacomprehensibledescriptionanddiscussionofthemethodsapplied.
Secondly,someoftheflagshipprojectshavesignificantlyhighvisibility,notonlyin
thescientificdiscoursebutalsoinpracticeandplanning.Citiesaroundtheglobecopy
BarcelonaorBilbaoandhopetobenefitfromasimilar“successful”development.Acriti‐
calreflectionoftheseurbandevelopmentmodelstakesplaceinacademiabutfailstofind
itswaytothestakeholdersinplanningandpolicy.Howcanthistransferofknowledge
takeplace?Theaimhereisnottoavoidfurthermegaprojects,butratherenablelearning
processesbetweenthem—anareathathasnotattractedenoughinterestthusfar[84].
Hence,moreresearchmustbeconductedonhowtocopewiththesephenomena.Weal‐
readyknowwhythenarrativesofsuccessfulmegaprojectsarelinkedtogentrificationand
tourismfromtheperspectiveofprojectinitiators.Wealsoknowwheretheseprocesses
takeplaceandhowtoframetheobservationswithinthecontextofneoliberalization,the
entrepreneurialturn,etc.However,thereisfarlessknowledgeofhowtomakeitbetter—
bybothcontributingtofindingacity’splaceintheglobalurbannetwork,butwithout
fosteringpolarization,segregation,andotherconflictsintheirurbanarenas.Themain
problemhereisthattheplanningofmegaprojectsissocomplexthataddingsocialsus‐
tainabilityasafurthercriterioneasilyoverloadstheprocess,althoughitshouldbethe
mainrationaleofplanninganyway.
Thirdly,akeyquestionishowCOVID‐19willaffecttherelationshipbetweenmega‐
projects,gentrification,andtourism.Iseeseveralpandemic‐inducedturningpoints,with
animpactoneachofthesephenomena.Duetothecurrenteconomicrecession[85],anum‐
berofprojectsunderconstructionmightfacefinancialdifficulties,whichendangerstheir
success.Paradoxically,itcanbeassumedthatmanycitieswillfeeltheneedtoboosttheir
economiesbymeansofmegaprojects,justasintheaftermathof2008′seconomiccrisis[24]
ortheAsianfinancialcrisis[80].Ialsoexpecttourismtoplayafundamentalroleinthese
futureprojects,basedonthestrongturntowardtourismasagrowthstrategyincountries
suchasSpainafter2008.Withregardtogentrification,somescholarsexpectaneven
strongernewwaveoftheprocessintheaftermathofCOVID‐19.Thisso‐called“disaster
gentrification”[86]willrolloverneighborhoodsthatareleftsociallyvulnerablenotonly
duetotheeconomiccrisis,butalsoduetorenewedausterityprograms.Thisproblemisa
futurelineofresearchwithimmediaterelevance.Wewillnotonlyneedtoinvestigate
howtoprovideappropriatepolicyinstrumentstocopewiththepossibleimpactsbutalso
howtomakelarge‐scaleurbandevelopmentprojects(socially)moresustainableinthe
firstplace.
Funding:Thisresearchreceivednoexternalfunding.IacknowledgesupportfromLeipzigUniver‐
sityforOpenAccessPublishing.
InstitutionalReviewBoardStatement:Notapplicable.
InformedConsentStatement:Notapplicable.
ConflictsofInterest:Theauthordeclaresnoconflictofinterest.
Sustainability2021,13,1282721of23
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