Peer pressure, social spillovers, and reciprocity: an experimental analysis
通过修改投资游戏实验，研究同伴压力（自己的选择被他人观察）和社会溢出（受托人之间的选择互动）如何影响互惠行为，发现两者均能促进互惠，同伴压力作用更强。
Abstract This study examines whether reciprocity is affected by what others know and do. Two types of social effects are investigated within the framework of a modified investment game. On the one hand, we assess the role played by the awareness that own choices are observed by another trustee—i.e., peer pressure. On the other hand, we measure the interaction between trustees’ choices—i.e., social spillovers. We find that peer pressure fosters reciprocity and, to a lesser extent, so do social spillovers.