Repeated interactions provide a prominent but paradoxical hypothesis for human cooperation in one-shot interactions … mechanism reliably supports the evolution of cooperation when actions vary continuously. Ambiguous reciprocity, a strategy … generally ruled out in models of reciprocal altruism, completely undermines cooperation under repeated interactions, which …

social heuristics, suggest boundary conditions on spillover effects of cooperation, and demonstrate the power of effective … institutions for instilling habits of virtue and creating cultures of cooperation …

whether the prospect of losses can induce cooperation, we let experimental subjects play the traveler's dilemma in the gain …

material payoff. Cooperative behavior when non-cooperation is a dominant strategy (with respect to the material payoffs) is … particularly puzzling. Here we propose a novel approach to explain cooperation, assuming what Halpern and Pass (2013) call …

, little is known about the effect of group size on cooperation. Does larger group size favour or prevent cooperation? We …

pillar is internalized norms of cooperation, sustained by emotions such as guilt and shame. The second pillar is the … motivation can sustain cooperation if enough people cooperate but can jeopardise social order if many others follow selfish …

same partner in the future, both a novel experiment and a meta-study document higher cooperation rates if this likelihood … line with the notion that contagion of cooperation is more likely the higher the likelihood of being re-matched with the …

We analyze the interplay between cooperation norms and people's punishment behavior in a social-dilemma game with …

Carpenter and Matthews (2009) examine the cooperation norms determining people's punishment behavior in a social …