higher the levels of cooperation. We compare the behavior from these in finitely repeated games with behavior from finitely … repeated games of the same expected length and we find that there is more cooperation in the in finitely repeated games …

punishment costs. The negative effect of altruism on cooperation and material payoffs is greater the stronger is the reciprocity … when group members have opportunities to punish low contributors. Cooperation may also be supported if individuals are … embodying both reciprocity and altruism we show that unconditional altruism towards other members attenuates the punishment …

determine whether a network is consistent with trade and cooperation between every buyer and seller that are connected. We show … that three network features reduce the minimal discount factor necessary for sustaining cooperation: moderate competition …

collusion via effective punishment and forgiveness. Remarkably, subjects never learn the best-reply correspondence of the one …-shot game. Our results suggest a new explanation for the emergence of cooperation. …

Community enforcement is an important device for sustaining efficiency in some repeated games of cooperation. We … investigate cooperation when information about players' reputations spreads to their future partners through links in a social … network that connects them. We find that information supports cooperation by increasing trust between players, and obtain the …

dilemmas. It is in the self-interest of voters and is often favorably contrasted with letting citizens take punishment into …

dilemma in which self-interest should produce a sub-optimal outcome absent sanctions for non-cooperation. We then test … experimentally whether subjects make the theoretically optimal choice of a formal sanction scheme that costs less than the surplus it …

social norm of high cooperation. This norm appears to guide subjects' cooperation and punishment choices, including the … that avoid these costs and whether other, more centralized, punishment systems are superior and will be preferred by the … people. Here, we show that efficient peer sanctioning without much need for costly punishment emerges quickly if we introduce …

the accountable state by conducting a two-level public goods experiment in which civic engagement can build a sanction … taxation. In addition, we find that local social interaction among subgroups of participants also boosts cooperation. …

We present results from a novel experiment on the effect of a policy designed to encourage cooperation in a prisoner …'s dilemma game. We find that the effect of this policy on the level of cooperation is greater when it was chosen democratically …