Journal
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
Volume 385, Issue 1, Pages 379-384Publisher
ELSEVIER
DOI: 10.1016/j.physa.2007.06.008
Keywords
scale free network; prisoner's dilemma; cooperation
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The evolution of strategies in the iterated prisoner's dilemma on scale-free networks is investigated. It is found that the smaller the average degree is, the easier it is to promote cooperation by natural selection. Cooperation on scale-free networks built upon big clustering coefficients is enhanced and maintained at a high level. The introduction of punishment strategy for unsatisfied agents also increases cooperation and improves its persistence on scale-free networks. (C) 2007 Elsevier B.V. All rights reserved.
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