depends on both the individual and the context. For example, non-zero-sum cooperation (e.g. in social dilemmas like the … favor social dilemma cooperation regardless of gender, but only favor DG giving among women. Here I present meta …-analytic evidence in support of this prediction. In 31 studies examining social dilemma cooperation (N=13,447), I find that promoting …

We offer a game-theoretic proof of Hamilton's rule for the spread of altruism. For a simple case of siblings, we show … altruism ; Hamilton's rule ; one-shot prisoner's dilemma game …

crucial in promoting large-scale cooperation. …

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 …

during the early stages of matches is typically superseded by non-cooperation during the latter stages. The propensity for …

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 …

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. …

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 …