that group identity is a key factor in the explanation of intergroup cooperation and competition. …

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 …

Selfish, strategic players may benefit from cooperation, provided they reach agreement. It is therefore important to … construct mechanisms that facilitate such cooperation, especially in the case of asymmetric private information. The two major …