cooperation within groups, it also has a detrimental impact on group earnings in the short-run. Could the introduction of pre …-play threats to punish have enough of a beneficial impact on cooperation, while not incurring the cost associated with actual … punishment leads to lower threats, cooperation and welfare, restoring them to levels equal to or below the levels attained in the …

We use skin conductance responses and self-reports of hedonic valence to study the emotional basis of cooperation and …. The application of sanctions activates a "virtuous emotional circle" that accompanies cooperation. Emotionally aroused … punished, and increase their subsequent level of cooperation. The outcome is an increased level of contribution that becomes …

Cooperation among people who are not related to each other is sustained by the availability of punishment devices which …

(1996). We prove that under heterogeneity in values or decay involving only two degrees of freedom, all networks can … supported as Nash. Moreover, we show that Nash networks may not always exist. In the absence of decay, neither result can be …