Prisoner's Dilemma on community networks

Details Prisoner's Dilemma on community networks Prisoner's Dilemma on community networks

2006-09-27

arxiv.org/abs/physics/0609239v2

Physica A (2007), doi:10.1016/j.physa.2006.12.024

Physics

Physics and Society

final version

Scientific paper

10.1016/j.physa.2006.12.024

We introduce a community network model which exhibits scale-free property and study the evolutionary Prisoner's Dilemma game (PDG) on this network model. It is found that the frequency of cooperators decreases with the increment of the average degree $\bar{k}$ from the simulation results. And reducing inter-community links can promote cooperation when we keep the total links (including inner-community and inter-community links) unchanged. It is also shown that the heterogeneity of networks does not always enhance cooperation and the pattern of links among all the vertices under a given degree-distribution plays a crucial role in the dominance of cooperation in the network model.

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