Social Learning and Voluntary Cooperation Among Like-Minded People
实验发现，由已知的志同道合合作者组成的群体能维持更高合作水平，而志同道合的搭便车者群体中会出现策略性合作但最终崩溃，说明群体构成和异质性动机的社会学习对理解合作动态很重要。
Many people contribute to public goods but stop doing so once they experience free riding.We test the hypothesis that groups whose members know that they are composed only of 'like-minded' cooperators are able to maintain a higher cooperation level than the most cooperative, randomly-composed groups.Our experiments confirm this hypothesis.We also predict that groups of 'like-minded' free riders do not cooperate.Yet, we find a high level of strategic cooperation that eventually collapses.Our results underscore the importance of group composition and social learning by heterogeneously motivated agents to understand the dynamics of cooperation and free riding.