observe surprisingly high levels of cooperation and altruism within groups in conflict situations such as civil wars. We …

We study the coevolution of cooperation, preferences and cooperative signals in an environment where individuals engage … in a signaling-extended prisoner's dilemma. We identify a new type of evolutionary equilibrium - a transitional … behavior, preferences, and signaling. We thereby offer an explanation for persistent regularities observed in laboratory and …

norms on cooperation. We find that under the signaling mechanism, less cooperative players disguise themselves in the rule …-following game, but this does not decrease cooperation overall. More importantly, the signaling mechanism has a heterogeneous effect … decreases cooperation in rule-breaking groups. Finally, the signaling mechanism tends to offset the decline of contributions …

capability of resulting alliances and, consequently, decreases the amount of militarized conflict. In order to measure the … finds that relational similarity better explains observed patterns of conflict than existing measures. …

We study the coevolution of cooperation, preferences, and cooperative signals in an environment where individuals … engage in a signaling-extended prisoner's dilemma. We prove the existence of a cooperative equilibrium constituted by a (set …, preferences, and signaling. We thereby offer an explanation for the persistent regularities observed in laboratory and field data …

norms on cooperation. We find that under the signaling mechanism, less cooperative players disguise themselves in the rule …-following game, but this does not decrease cooperation overall. More importantly, the signaling mechanism has a heterogeneous effect … decreases cooperation in rule-breaking groups. Finally, the signaling mechanism tends to offset the decline of contributions …

Surprisingly high levels of within-group cooperation are observed in conflict situations. Experiments confirm that … external threats lead to higher cooperation. The psychological literature suggests proximate explanations in the form of group … which cooperation is a rational response to an external threat. In the model, groups vary in their willingness to help each …

We study dynamic signaling when the informed party does not observe the signals generated by her actions. A forward …