Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16010
Title: Peer pressure : enhancement of cooperation through mutual punishment
Authors: Yang, HX
Wu, ZX
Rong, Z
Lai, YC
Issue Date: 2015
Publisher: American Physical Society
Source: Physical review. E, Statistical, nonlinear, and soft matter physics, 2015, v. 91, no. 2, 22121 How to cite?
Journal: Physical review. E, Statistical, nonlinear, and soft matter physics 
Abstract: An open problem in evolutionary game dynamics is to understand the effect of peer pressure on cooperation in a quantitative manner. Peer pressure can be modeled by punishment, which has been proved to be an effective mechanism to sustain cooperation among selfish individuals. We investigate a symmetric punishment strategy, in which an individual will punish each neighbor if their strategies are different, and vice versa. Because of the symmetry in imposing the punishment, one might intuitively expect the strategy to have little effect on cooperation. Utilizing the prisoner's dilemma game as a prototypical model of interactions at the individual level, we find, through simulation and theoretical analysis, that proper punishment, when even symmetrically imposed on individuals, can enhance cooperation. Also, we find that the initial density of cooperators plays an important role in the evolution of cooperation driven by mutual punishment.
URI: http://hdl.handle.net/10397/16010
ISSN: 1539-3755
EISSN: 1550-2376
DOI: 10.1103/PhysRevE.91.022121
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