The effects of nonlinear imitation probability on the evolution of cooperation

The effects of nonlinear imitation probability on the evolution of cooperation
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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:
Chaos Solitons & Fractals
影响因子:
--
通讯作者:
Junzhong Yang
Junzhong Yang
中科院分区:
其他
文献类型:
--
作者:
Qionglin Dai;Haihong Li;Hongyan Cheng;Mei Zhang;Junzhong Yang

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本文将非线性模仿规则引入进化囚徒困境博弈,研究了非线性模仿规则对合作的影响。在原有的比例模仿规则的基础上,引入一个参数α来调节每个个体的模仿概率,从而调节模仿概率对收益差的依赖性。结果表明,存在一个最优的α值,在该值处,合作水平达到最高。我们在不同类型的网络中进行了模拟,具有不同的平均度。结果表明,由α的变化引起的最优合作行为是鲁棒的.更重要的是,从结果中我们可以得出,有两个决定最优合作行为的关键因素:一个是参数α,另一个是支持模仿概率对支付差依赖性强变化的支付差制度。
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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发表时间: 2007-11-01
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