Under what conditions can cooperation be sustained in a network of strangers? Here we study the role of institutions … possible, including full intertemporal cooperation supported by a social norm based on community punishment of defectors. We … coordination on intertemporal cooperation in ways that networks of strangers were unable to achieve through social norms. …

that group identity is a key factor in the explanation of intergroup cooperation and competition. …

Revealing the identities of contributors has been shown to increase cooperation in public goods games. In this paper we … computer chat. The results confirm the positive effect of identification on cooperation among individuals. For groups, however …, we only find a small and temporary effect of identification, irrespective of the type of communication. The reason for …

beliefs with experience are central to understanding behavior and learning in the IRPD. Beliefs strongly predict cooperation …

Pledges feature in international climate cooperation since the 2015 Paris Agreement. We explore how differences in … the Paris Agreement, can leverage the power of trustworthiness to enhance cooperation. …

Previous research has suggested that communication and especially promises in-crease cooperation in laboratory … that communication impacts cooperation in our experiments with single-blind payoff proce-dures. Further, the payoff … of communication varies with social distance. Employing a 2x2 design, we find no evidence that communication increases …