“…Two explanations suggest themselves. First, men may fail to understand the extent to which women dislike competition and attribute too much of the difference in behavior across gender to ability differences 3 For further supporting evidence, see, for instance, Gupta, Poulsen, and Villeval (2005), Garratt, Weinberger, and Johnson (2013), Vandegrift andYavas (2009), Cason, Masters, andSheremeta (2010), and Fletschner, Anderson, and Cullen (2010). However, Gneezy, Leonard, and List (2009) found the same effect in a traditional patriarchal society, but not in a matrilineal one, Charness and Villeval (2009) found no effect, Kamas and Preston (2012) found differences only for business majors, Wozniak, Harbaugh, and Mayr (2010) found that feedback about relative performance in a piece-rate stage reduces the gender entry gap, and Charness, Rustichini, and van de Ven (2012) found no effect when controlling for confidence.…”