Department of Computer Science, University of Maryland, , College Park, MD, USA, Department of Psychology, University of Maryland, , College Park, MD, USA, Institute for Advanced Computer Studies, University of Maryland, , College Park, MD, USA, Institute for Systems Research, University of Maryland, , College Park, MD, USA.
Proc Biol Sci. 2013 Dec 11;281(1776):20132661. doi: 10.1098/rspb.2013.2661. Print 2014 Feb 7.
As punishment can be essential to cooperation and norm maintenance but costly to the punisher, many evolutionary game-theoretic studies have explored how direct punishment can evolve in populations. Compared to direct punishment, in which an agent acts to punish another for an interaction in which both parties were involved, the evolution of third-party punishment (3PP) is even more puzzling, because the punishing agent itself was not involved in the original interaction. Despite significant empirical studies of 3PP, little is known about the conditions under which it can evolve. We find that punishment reputation is not, by itself, sufficient for the evolution of 3PP. Drawing on research streams in sociology and psychology, we implement a structured population model and show that high strength-of-ties and low mobility are critical for the evolution of responsible 3PP. Only in such settings of high social-structural constraint are punishers able to induce self-interested agents toward cooperation, making responsible 3PP ultimately beneficial to individuals as well as the collective. Our results illuminate the conditions under which 3PP is evolutionarily adaptive in populations. Responsible 3PP can evolve and induce cooperation in cases where other mechanisms alone fail to do so.
作为惩罚对于合作和规范维持至关重要,但对惩罚者来说代价高昂,因此许多进化博弈论研究都探讨了直接惩罚如何在人群中进化。与直接惩罚相比,直接惩罚是指一个代理人因双方都参与的互动而对另一个人进行惩罚,第三方惩罚(3PP)的进化更加令人费解,因为惩罚者本身没有参与最初的互动。尽管对 3PP 进行了大量的实证研究,但对于它能够进化的条件知之甚少。我们发现,惩罚声誉本身不足以促成 3PP 的进化。借鉴社会学和心理学的研究脉络,我们实施了一个结构化的人口模型,并表明高强度的联系和低流动性对于负责任的 3PP 的进化至关重要。只有在这种高度社会结构约束的环境下,惩罚者才能促使自私的代理人走向合作,从而使负责任的 3PP 最终对个人和集体都有利。我们的研究结果阐明了 3PP 在群体中具有进化适应性的条件。在其他机制单独失效的情况下,负责任的 3PP 可以进化并诱导合作。