In this study, dormitory room and social group assignment data from a college are used to investigate peer effects on college students' decisions to switch majors. Results reveal strong evidence of such peer effects at both the room and the social group level. Most notably, at the room level, the dense concentration of same-major roommates deters…

This study used college dormitory room and social group assignment data to investigate the peer effect on the probability of college students switching their major fields of study. The results revealed strong evidence of peer effects on students' decisions to switch majors. In particular, the number of a student's peers who have the same major…