performance and their labor market income. We exploit the within-school, cohort-by-cohort variation in the gender composition of … high school classmates (peers), after controlling for school and teachers fixed effects. We find that male students … performance and change in major. And in the long run it did not produce any difference in income or labor market outcomes. We do …

students graduated from high school between 1985 and 2005 to identify siblings. We follow the academic career of these …