goods provision - the quick emergence of a widely accepted social cooperation norm that demands high contributions but - in … consensus as well as the high cooperation demands required by the norm break down. However, when peer punishment is possible … cooperation and welfare - the opportunity to form a social norm unambiguously causes high public good contributions and group …

equilibrium strategy. Exclusion has a positive impact on cooperation when it is followed by a quick rather than a slow … retaliation. Post-exclusion cooperation and forgiveness depend not only on the length of exclusion but also on the perceived …

facilitate and obstruct cooperation in a repeated prisoners' dilemma game. In finitely repeated games a player who cares only for … infinitely repeated games with two emotional players less patience is required to sustain cooperation. However, emotions can also … obstruct cooperation if they make the players unwilling to punish each other, or if the players become hostile when punished. …