Yang Han-Xin, Wu Zhi-Xi, Wang Bing-Hong
Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
Phys Rev E Stat Nonlin Soft Matter Phys. 2010 Jun;81(6 Pt 2):065101. doi: 10.1103/PhysRevE.81.065101. Epub 2010 Jun 1.
Both cooperation and migration are ubiquitous in human society and animal world. In this Rapid Communication, we propose an aspiration-induced migration in which individuals will migrate to new sites provided that their payoffs are below some aspiration level. It is found that moderate aspiration level can best favor cooperative behavior. In particular, moderate aspiration level enables cooperator clusters to maintain and expand whereas induces defector clusters to disintegrate, thus promoting the diffusion of cooperation among population. Our results provide insights into understanding the role played by migration in the emergence of cooperative behavior.
合作和迁移在人类社会和动物世界中都普遍存在。在这篇快速通讯中，我们提出了一种由期望引发的迁移，即只要个体的收益低于某个期望水平，他们就会迁移到新的地点。研究发现，适度的期望水平最有利于合作行为。具体而言，适度的期望水平能使合作者群体得以维持和扩大，同时促使背叛者群体瓦解，从而促进合作在群体中的传播。我们的研究结果为理解迁移在合作行为出现过程中所起的作用提供了见解。
