Abstract: We explore gender dynamics in referral-based hiring using a field study at a top European business school. In the study, 455 students were asked to refer another student at the school for a part-time job. We find strong evidence of gender homophily in referrals among both male and female students. While the overall gender distribution of students at the school is fairly equal, 74 percent of male students refer a man and 71 percent of female students refer a woman. Roughly half of the gender homophily can be accounted for by the gender composition of friendship networks. The results are robust across jobs with varying gender stereotypicality.