Realizing cooperation through slightly altruistic individuals: An evolutionary game theoretical approach

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The purpose of this paper is to show that slightly altruistic individuals can build up the cooperative group. We suppose that the sot of agents having various altruistic dispositions are randomly matching and on each matching the agents play the two person's Prisoner's Dilemma game. According to the analysis of this paper, it is clarified that if the conditions that (1) the incentive of deviation from "mutual Cooperation" is small, (2) agents are similar in altruistic disposition, and (3) the initial value of Cooperation rate is high, are satisfied, the system leads to be stable state where the agents taking Cooperation are in majority.

Original languageEnglish
Pages (from-to)89-104
Number of pages16
JournalSociological Theory and Methods
Issue number1
Publication statusPublished - 2002
Externally publishedYes



  • Altruistic parameter
  • Best-reply dynamic
  • Payoff and utility
  • Prisoner's dilemma

ASJC Scopus subject areas

  • Social Sciences (miscellaneous)
  • Sociology and Political Science

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