conduct an experiment in which the shares of girls in workgroups for first year students in economics and business are … manipulated and students are randomly assigned to these groups. Boys tend to postpone their dropout decision when surrounded by … effects on achievement. This in spite of the fact that students' perceptions of the behavior of themselves and their peers are …

2013. Costly mistakes have externalities: they transfer tuition waivers from high- to low-socioeconomic status students …, and increase the number of students attending college. To shed light on the mechanisms underlying mistakes, we exploit a …