Peer Effects in Risk Aversion and Trust
利用MBA学生随机分组和预先调查的经济态度数据，发现风险厌恶存在正向同伴效应（第一年后个体与同伴平均风险厌恶差距缩小41%），而信任无此效应。
Existing evidence shows that risk aversion and trust are largely determined by environmental factors. We test whether one such factor is peer influence. Using random assignment of MBA students to peer groups and predetermined survey responses of economic attitudes, we find causal evidence of positive peer effects in risk aversion and no effects in trust. After the first year of the MBA program, the difference between an individual and her peers' average risk aversion has shrunk by 41%. Finding no peer effects in trust is consistent with recent research showing that distinct cognitive processes govern risk aversion and trust.