Single‐sex classes within coeducational environments are likely to modify students' risk‐taking attitudes in economically important ways. To test this, we designed a controlled experiment using first year college students who made choices over real‐stakes lotteries at two distinct dates. Students were randomly assigned to classes...

Women and men may differ in their propensity to choose a risky outcome because of innate preferences or because their innate preferences are modified by pressure to conform to gender-stereotypes. Single-sex environments are likely to modify students’ risk-taking preferences in economically important ways. To test...

Using a controlled experiment, this paper examines the role of nurture in explaining the stylized fact that women shy away from competition.