主 题：Endogenous Rewards Promote Cooperation
主办单位：中国行为经济与行为金融研究中心 经济学院 科研处
杨春雷教授是世界一流实验与行为经济学家，德国多特蒙德大学经济学博士，教育部长江学者特聘教授，从2016年起担任南京审计大学教授。主要研究微观经济学、博弈论、实验与行为经济学，在Journal of Economic Theory, Games and Economic Behavior, Experimental Economics, Journal of Economic Behavior and Organization, European Economic Review等国际权威学术期刊发表论文20余篇。
Sustaining cooperation in social dilemmas is a fundamental objective in the social and biological sciences. While providing a punishment option to community members in the public-goods game (PGG) has been shown to effectively promote cooperation, this has some serious disadvantages; these include destruction of a society’s physical resources as well as its overall social capital. A more efficient approach may be to instead employ a reward mechanism.
We propose an endogenous reward mechanism that taxes (at the rate of 20%) the gross income of each round’s PGG play and assigns the amount to a fund; each player then decides on how to distribute his or her share of the fund as rewards to other members of the community. Our anonymous mechanism successfully achieves a high level of contribution (about 70%) with budget-balanced (1:1) rewards that require no external funding, an important condition for realistic implementation. Our results are consistent with the higher contribution levels under endogenous rewards being driven by two key components: First, a strategic response to reward formation can help avoid the no-contribution outcome. Second, conditional cooperation plays a crucial role in maintaining high levels of public-goods contributions.