Cautious strategy update promotes cooperation in spatial prisoner's dilemma game

Liu Y, Zhang L, Chen X, Ren L, & Wang L (2013). Cautious strategy update promotes cooperation in spatial prisoner's dilemma game. Physica A: Statistical Mechanics and its Applications 329 (17): 3640-3647. DOI:10.1016/j.physa.2013.04.031.

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Abstract

In the realistic world, individual cautiousness can be often involved or observed when a rational indvidual makes a decision. However, it remains unclear how such individual cautiousness influences the evolution of cooperative behavior. To this end, we consider a Fermi strategy updating rule, where each individual is assigned a cautiousness index that controls its learning activity, and then study the evolution of coperation in the spatial prisoners dilemma game. Interestingly, it is found that cooperation can be significanly promoted when individuals cautiousness is considered. In particular, there exists an optimal range of the degree of cautiousness resulting in the highest cooperation level. The remarkable promotion of cooperation, as well as the emerging phase transition is explained by configurational analysis. The sensitivity of cooperation to initial states with different fractions of cooperators is also discussed. The result illustrates that high densities of cooperators can be established at small initial fractions of cooperators. The detailed mechanism for such phenomenon is explained by analyzing the typical initial configurations.

Item Type: Article
Uncontrolled Keywords: Prisoner's dilemma; Cooperation; Cautious
Research Programs: Evolution and Ecology (EEP)
Bibliographic Reference: Physica A: Statistical Mechanics and its Applications; 329(17):3640-3647 (September 2013) (Published online 27 April 2013)
Depositing User: IIASA Import
Date Deposited: 15 Jan 2016 08:48
Last Modified: 29 Feb 2016 12:50
URI: http://pure.iiasa.ac.at/10429

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