Cooperation control based on compensation in global dilemmas

Cooperation among unrelated individuals is unique to humans, and needed to prevent risks in today's world. People all over the world are involved in global social dilemmas, such as preventing global warming. To investigate the evolutionary process of cooperation, we build a model of threshold public goods game in a group structured population, and introduce an mechanism to analyze the emergency of cooperators. It is found that global cooperation could be promoted when risks are high and there exists a high threshold. Further, the introduction of compensation is in favor of the evolution of global cooperation. Besides, global cooperation arises with the increase of imitation intensity. On the other hand, the fixation time of global cooperation is sharply shortened after introducing compensation mechanism.