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

. -- Imperfect Altruism ; Real Options ; Hyperbolic Discounting ; Time Inconsistency ; Natural Resources Management …

The evolution of large-scale cooperation among genetic strangers is a fundamental unanswered question in the social … the endogenous enforcement of cooperation. Insofar as strongly reciprocal players are willing to costly sanction defectors …, cooperation flourishes. However, experimental evidence unambiguously indicates that not only defection and strong reciprocity, but …

to the normative and positive theory of public goods provision. First, it is a price based mechanism achieving efficient … ; Altruism ; Competitive equilibrium ; Free riding ; Public goods provision …