中国物理B ›› 2010, Vol. 19 ›› Issue (1): 10204-010204.doi: 10.1088/1674-1056/19/1/010204

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Evolutionary prisoner's dilemma on Newman--Watts socialnetworks with an asymmetric payoff distribution mechanism

杨涵新1, 杜文博2, 曹先彬2, 胡茂彬3   

  1. (1)Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China; (2)School of Computer Science and Technology, University of Science and Technology of China, Hefei 230026, China; (3)School of Engineering Science, University of Science and Technology of China, Hefei 230026, China
  • 收稿日期:2009-05-18 修回日期:2009-06-22 出版日期:2010-01-15 发布日期:2010-01-15
  • 基金资助:
    Project supported by the Major State Basic Research Development Program of China (Grant No. 2004CB318109), Program for New Century Excellent Talents in University of China (Grant No. NCET-07-0787) and the National Natural Science Foundation of China (Grant No. 70601026).

Evolutionary prisoner's dilemma on Newman--Watts socialnetworks with an asymmetric payoff distribution mechanism

Du Wen-Bo(杜文博)a), Cao Xian-Bin(曹先彬)a), Yang Han-Xin(杨涵新)b), and Hu Mao-Bin(胡茂彬)c)*   

  1. a School of Computer Science and Technology, University of Science and Technology of China, Hefei 230026, China; b Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China; c School of Engineering Science, University of Science and Technology of China, Hefei 230026, China
  • Received:2009-05-18 Revised:2009-06-22 Online:2010-01-15 Published:2010-01-15
  • Supported by:
    Project supported by the Major State Basic Research Development Program of China (Grant No. 2004CB318109), Program for New Century Excellent Talents in University of China (Grant No. NCET-07-0787) and the National Natural Science Foundation of China (Grant No. 70601026).

摘要: In this paper, we introduce an asymmetric payoff distribution mechanism into the evolutionary prisoner's dilemma game (PDG) on Newman--Watts social networks, and study its effects on the evolution of cooperation. The asymmetric payoff distribution mechanism can be adjusted by the parameter α: if α>0, the rich will exploit the poor to get richer; if α<0, the rich are forced to offer part of their income to the poor. Numerical results show that the cooperator frequency monotonously increases with α and is remarkably promoted when α>0. The effects of updating order and self-interaction are also investigated. The co-action of random updating and self-interaction can induce the highest cooperation level. Moreover, we employ the Gini coefficient to investigate the effect of asymmetric payoff distribution on the the system's wealth distribution. This work may be helpful for understanding cooperative behaviour and wealth inequality in society.

Abstract: In this paper, we introduce an asymmetric payoff distribution mechanism into the evolutionary prisoner's dilemma game (PDG) on Newman--Watts social networks, and study its effects on the evolution of cooperation. The asymmetric payoff distribution mechanism can be adjusted by the parameter α: if $\alpha>0$, the rich will exploit the poor to get richer; if $\alpha<0$, the rich are forced to offer part of their income to the poor. Numerical results show that the cooperator frequency monotonously increases with α and is remarkably promoted when $\alpha>0$. The effects of updating order and self-interaction are also investigated. The co-action of random updating and self-interaction can induce the highest cooperation level. Moreover, we employ the Gini coefficient to investigate the effect of asymmetric payoff distribution on the the system's wealth distribution. This work may be helpful for understanding cooperative behaviour and wealth inequality in society.

Key words: prisoner's dilemma game, cooperation, complex social networks

中图分类号:  (Networks and genealogical trees)

  • 89.75.Hc
02.50.Le (Decision theory and game theory) 02.50.Ng (Distribution theory and Monte Carlo studies) 89.65.-s (Social and economic systems)