indirect reciprocity in the context of the evolution of cooperation, basic models of social dilemma situations, the path taken … in the elaboration of mathematical analysis using evolutionary game theory, the discovery of image scoring norms, and the …

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. …

Intensive studies on indirect reciprocity have explored rational assessment rules for maintaining cooperation and … hybrid-assessment scheme in which players use both assessment systems and by using evolutionary game theory. We calculated … replicator equations using the expected payoffs of three strategies: unconditional cooperation, unconditional defection, and …

conditionally cooperative preferences. Cooperation generated by this type of preferences is notoriously unstable, as individuals …-shared conclusion that cooperation observed in experiments (and its collapse) is mostly driven by imperfect reciprocity. In this study …

Case studies of cartels and recent theory suggest that repeated communication is key for stable cooperation in … understood. We study cooperation under different monitoring and communication structures in the laboratory. Under all monitoring … monitoring, where actions can only be observed with noise, cooperation is stable only when subjects can communicate before every …

analyze LLM responses to different payoff stakes and the influence of stake order on cooperation rates. LLMs demonstrate …

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 …

externality. A within-subjects measure of reticence to impose harm does not explain cooperation. But the externality makes … participants more pessimistic. However conditional on their beliefs participants are more, not less cooperative if cooperation …

This paper experimentally examines how religious festivals and the degree of religiosity affect cooperation and … religious festivals other than the normal daily prayers. The overall results show no differences in cooperation or altruistic … differences in beliefs about others contributions. By and large, this indicates the importance of conditional cooperation …