Peer Effects and Students’ Self-Control

We conducted a multi-wave field experiment to study the interaction of peer effects and self-control among undergraduate students. We use a behavioral measure of self-control based on whether students achieve study related goals they have set for themselves. We find that both self-control and the number of talented friends increase students’ performance. We then set out to test the theoretical prediction of Battaglini, Benabou and Tirole (2005) that (only) sufficiently self-controlled individuals profit from interactions with peers. We find that peers with high self-control are more likely to connect to others, have a higher overall number of friends and have a higher number of talented friends. Moreover, positive news about self-controlled behavior of their peers increases students’ own perseverance. Hence, our findings are consistent with the model of Battaglini, Benabou and Tirole. In addition, we find that female students are more likely to have high self-control, but do not outperform male students. One reason for this is that female students have a lower number of talented friends than their male counterparts, thereby profiting less from positive peer effects.