... Accordingly, overconfident CEOs exhibit not only excessive willingness to overinvest but also an overly large appetite to diversify to avoid the diminishing 2 Potential benefits from diversification arise, for instance, from economies of scope (Teece (1980), Teece (1982), Matsusaka (2001)), debt coinsurance effects (Lewellen (1971), Stein (2003)), internal capital markets (Stein (1997)), and fewer failures in product, labor, and financial markets (Khanna and Palepu (2000)). 3 For the value destruction impact of corporate diversification, see, for instance, Lang and Stulz (1994), Berger and Ofek (1995), Servaes (1996), Lins and Servaes (1999), Rajan et al. (2000), Scharfstein and Stein (2000), and Hoechle et al. (2012). 4 Recent studies, however, question the presence of the diversification discount and suggest that the lower valuations of diversified firms are illusory and the outcome of methodological problems; see, for instance, Whited (2001), Campa and Kedia (2002), Graham et al. (2002), Mansi and Reeb (2002), Villalonga (2004aVillalonga ( , 2004b, Glaser and Müller (2010), and Kuppuswamy and Villalonga (2015). ...