College of Economics, Interdisciplinary Center for Social Sciences (ICSS), Zhejiang University, Hangzhou, China.
School of Economics, Center for Economic Behavior and Decision-making (CEBD), Zhejiang University of Finance and Economics, Hangzhou, China.
Sci Rep. 2016 Aug 18;6:31927. doi: 10.1038/srep31927.
Humans benefit from extensive cooperation; however, the existence of free-riders may cause cooperation to collapse. This is called the social dilemma. It has been shown that punishing free-riders is an effective way of resolving this problem. Because punishment is costly, this gives rise to the second-order social dilemma. Without exception, existing solutions rely on some stringent assumptions. This paper proposes, under very mild conditions, a simple model of a public goods game featuring increasing returns to scale. We find that punishers stand out and even dominate the population provided that the degree of increasing returns to scale is large enough; consequently, the second-order social dilemma dissipates. Historical evidence shows that people are more willing to cooperate with others and punish defectors when they suffer from either internal or external menaces. During the prehistoric age, the abundance of contributors was decisive in joint endeavours such as fighting floods, defending territory, and hunting. These situations serve as favourable examples of public goods games in which the degrees of increasing returns to scale are undoubtedly very large. Our findings show that natural selection has endowed human kind with a tendency to pursue justice and punish defection that deviates from social norms.
人类受益于广泛的合作;然而,搭便车者的存在可能导致合作崩溃。这被称为社会困境。已经表明,惩罚搭便车者是解决这个问题的有效方法。因为惩罚是昂贵的,这就产生了二阶社会困境。无一例外,现有的解决方案都依赖于一些严格的假设。本文提出了一个非常温和的条件下,具有规模报酬递增的公共物品博弈的简单模型。我们发现,只要规模报酬递增的程度足够大,惩罚者就会脱颖而出,甚至主导整个群体;因此,二阶社会困境就会消散。历史证据表明,当人们面临内部或外部威胁时,他们更愿意与他人合作,并惩罚违约者。在史前时代,贡献者的丰富程度对于共同努力(如抗洪、保卫领土和狩猎)是决定性的。这些情况是公共物品博弈的有利例子,其中规模报酬递增的程度无疑非常大。我们的研究结果表明,自然选择赋予了人类追求正义和惩罚违反社会规范的行为的倾向。