The effects of nonlinear imitation probability on the evolution of cooperation
The effects of nonlinear imitation probability on the evolution of cooperation
复制标题
非线性模仿概率对合作演化的影响
DOI:
10.1016/j.chaos.2013.07.001
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发表时间:
2013-11
期刊:
影响因子:
--
通讯作者:
Junzhong Yang
中科院分区:
文献类型:
--
作者:
Qionglin Dai;Haihong Li;Hongyan Cheng;Mei Zhang;Junzhong Yang
In this paper, we introduce a nonlinear imitation rule into an evolutionary prisoner’s dilemma game and investigate how the nonlinear imitation rule affects cooperation. Based on the original version of the proportional imitation rule, the imitation probability for each individual is regulated by a parameter α, which tunes the dependence of the imitation probability on the payoff difference. The results show that there exists an optimal value of α at which the cooperation level reaches its highest value. We carry out the simulations in different types of networks with different mean degrees. Results show that the optimal behavior of cooperation induced by the variation of α is robust. More importantly, from the results we can conclude that there are two crucial factors determining the optimal behavior of cooperation: One is the parameter α, and the other is the regime of payoff difference supporting strong variation of the dependence of the imitation probability on the payoff difference.
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