This paper examines whether an institution has a differing impa ct on cooperation if it is introduced by a … implemented institutions lead to m ore cooperation than iden- tical exogenous institutions. Especially the subjects who i nitially …

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. …

types can be exploited to enhance cooperation by structuring the twice-played prisoners' dilemma to "start small," so that …