We examine whether integrating men and women in a traditionally male-dominated environment can change men's attitudes about mixed-gender productivity, gender roles, and gender identity. Our context is the military in Norway, where we randomly assigned female recruits to some squads but not others during boot camp. We find that living and working with women for eight weeks causes men to have more egalitarian attitudes. There is a 14 percentage point higher fraction of men who think mixed-gender teams perform as well or better than same-gender teams, an 8 percentage point increase in men who think household work should be shared equally, and a 14 percentage point increase in men who do not completely disavow feminine traits. Moreover, men in mixed-gender teams are more likely to choose military occupations immediately after boot camp that have a higher fraction of women in them. But these effects do not persist once treatment stops. Treated men’s attitudes converge to those of the controls in a six-month follow-up survey, and there is no long-term effect on choosing fields of study, occupations, or workplaces with a higher fraction of women after military service ends. Contrary to the predictions of many policy makers, we do not find that integrating women into squads hurt male recruits’ performance or satisfaction with service, either during boot camp or their subsequent military assignment. These findings provide evidence that even in a highly gender-skewed environment, gender stereotypes are malleable and can be altered by integrating members of the opposite sex. But they also suggest that without continuing intensive exposure, effects are unlikely to persist.

This paper estimates peer effects both from older to younger siblings and from parents to children in academic fields of study. Our setting is secondary school in Sweden, where admissions to oversubscribed fields is determined based on a student's GPA. Using an RD design, we find strong spillovers in field choices that depend on the gender mix of siblings and whether the field is gender conforming. There are also large intergenerational effects from fathers and mothers to sons, except in female-dominated fields, but little effect for daughters. These spillovers have long-term consequences for occupational segregation and wage gaps by gender.

This paper studies whether specialized academic fields of study in secondary school, which are common in many countries, affect earnings as an adult. Identification is challenging, because it requires not just quasi-random variation into fields of study, but also an accounting of individuals’ next-best alternatives. Our setting is Sweden, where at the end of ninth grade students rank fields of study and admissions to oversubscribed fields is determined based on a student’s GPA. We use a regression discontinuity design which allows for different labor market returns for each combination of preferred versus next-best choice, together with nationwide register data for school cohorts from 1977-1991 linked to their earnings as adults. Our analysis yields four main findings. First, Engineering, Natural Science, and Business yield higher earnings relative to most second-best choices, while Social Science and Humanities result in sizable drops, even relative to non-academic vocational programs. Second, the return to completing a field varies substantially as a function of a student’s next-best alternative. The magnitudes are often as large as estimates of the return to two years of additional education. Third, the pattern of returns for individuals with different first and second best choices is consistent with comparative advantage for many field choice combinations, while others exhibit either random sorting or comparative disadvantage. Fourth, most of the differences in adult earnings can be attributed to differences in college major and occupation. Taken together, these results highlight that the field choices students make at age 16, when they may have limited information about their skills and the labor market, have effects which last into adulthood.