login

Coevolutionary games on networks

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topicsPublished 20 November 2002Open access
Holger Ebel, Stefan Bornholdt
Citations270
View PDF

TL;DR

The transition from subcritical to critical avalanche dynamics can be traced to a change in the degeneracy of the cooperative macrostate and is observed for many variants of this game.

Abstract

We study agents on a network playing an iterated Prisoner's dilemma against their neighbors. The resulting spatially extended coevolutionary game exhibits stationary states which are Nash equilibria. After perturbation of these equilibria, avalanches of mutations reestablish a stationary state. Scale-free avalanche distributions are observed that are in accordance with calculations from the Nash equilibria and a confined branching process. The transition from subcritical to critical avalanche dynamics can be traced to a change in the degeneracy of the cooperative macrostate and is observed for many variants of this game.

Keywords

Social SciencesMedicineBiochemistry, Genetics and Molecular Biology