crucial in promoting large-scale cooperation. …

cooperation is not hampered, on average, by pollution persistence. Mitigation efforts, though, should not be delayed, because … cooperation levels appear to deteriorate for high stocks of pollution. …

Does monitoring past conduct facilitate intertemporal cooperation? We designed an experiment characterized by strategic … attain higher levels of cooperation compared to a treatment without monitoring. Information about past conduct alone thus …

Social norms of cooperation are studied under several forms of communication. In an experiment, strangers could make … play, and sometimes reduced it. Surprisingly, cooperation suffered when subjects could publicly commit to actions. …

cooperative task. The data show that clerical workers differ from college students in overall cooperation rates, strategy adoption … and use of punishment opportunities. Students cooperate more than workers. Cooperation increases in both subject pools … defection, and more likely to select strategies of conditional cooperation. Finally, students are more likely than workers to …

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 …

cooperative task. The data show that clerical workers differ from college students in overall cooperation rates, strategies … adopted, and use of punishment opportunities. Students cooperate more than workers, and cooperation increases in both subject … unconditional defection and more likely to select strategies of conditional cooperation. Finally, students are more likely than …