We examine the effect of payoff variations on cooperation in one-shot prisoner's dilemma games. We focus on three … impact on cooperation. Temptation directly deters cooperation and indirectly harms cooperation by lowering beliefs about the … opponent's cooperativeness. Efficiency indirectly affects cooperation through beliefs, but the magnitude of the effect is …

Existing research supports two opposing mechanisms through which positive mood might affect cooperation. Some studies … have suggested that positive mood produces more altruistic, open and helpful behavior, fostering cooperation. However … reduced use of information, hampering cooperation. We find evidence that suggests the second hypothesis dominates when playing …

-Stay-Lose-Shift, are not prevalent. We also find that the strategies used to support cooperation change with the parameters of the game … 'Gefangenendilemma' zu identifizieren. Die Teilnehmer werden gebeten, Strategien zu entwerfen, die an ihrer Stelle spielen sollen. Dabei …. Zudem stellt sich heraus, dass die Strategien, die Kooperation unterstützen sollen, sich mit den Parametern des Spiels …

mechanisms for sustaining cooperation. We present a novel intuitive combination of strategies that sustains cooperation in … essentially the unique mechanism to support full cooperation, and it is robust to various perturbations. Finally, we extend the … characterize which observation structure is optimal for sustaining cooperation. …