from over 40 countries: individual exposure to war violence tends to increase social cooperation at the local level … societies, it appears to leave a positive legacy in terms of local cooperation and civic engagement. We discuss, synthesize and …

highlighting the role of reputation mechanisms in sustaining cooperation. Reputational concerns can deter defection in one … cooperation within a group, we show theoretically that interactions of individuals from a punishment-based culture with those from … a culture of image scoring can lead to widespread inter-group tensions. Mutual cooperation is a more likely outcome if …

types can be exploited to enhance cooperation by structuring the twice-played prisoners' dilemma to "start small," so that …

We study the evolution of the social norm of "cooperation" in a dynamic environment. Each agent lives for two periods … completely drives equilibrium play, leading to a social norm of high or low cooperation. In intermediate cases, the impact of … leverage their greater visibility to influence expectations of future agents and overturn social norms of low cooperation. We …

rigor of modern economic analysis. Major theoretical developments in game theory, the economics of the family, and … endogenous growth theory have taken place. Economists have also performed new empirical research on social interactions, but the … empirical literature does not show progress comparable to that achieved in economic theory. This paper examines why and …