Economic demography in fuzzy spatial dilemmas and power laws

H. Fort () and Noelia Perez

The European Physical Journal B: Condensed Matter and Complex Systems, 2005, vol. 44, issue 1, 109-113

Abstract: Adaptive agents, playing the iterated Prisoner’s Dilemma (IPD) in a two-dimensional spatial setting and governed by Pavlovian strategies (“higher success-higher chance to stay”), are used to approach the problem of cooperation between self-interested individuals from a novel angle: We investigate the effect of different possible measures of success (MS) used by players to asses their performance in the game. These MS involve quantities such as: the player’s utilities U, his cumulative score (or “capital”) W, his neighborhood “welfare”, etc. To handle an imprecise concept like “success” the agents use fuzzy logic. The degree of cooperation, the “economic demography” and the “efficiency” attained by the system depend dramatically on the MS. Specifically, patterns of “segregation” or “exploitation” are observed for some MS. On the other hand, power laws, that may be interpreted as signatures of critical self-organization (SOC), constitute a common feature for all the MS. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Date: 2005
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DOI: 10.1140/epjb/e2005-00105-8

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