Evolution of ethnocentrism on undirected and directed Barabási–Albert networks

F.W.S. Lima, Tarik Hadzibeganovic and Dietrich Stauffer

Physica A: Statistical Mechanics and its Applications, 2009, vol. 388, issue 24, 4999-5004

Abstract: Using Monte Carlo simulations, we study the evolution of contingent cooperation and ethnocentrism in the one-shot game. Interactions and reproduction among computational agents are simulated on undirected and directed Barabási–Albert (BA) networks. We first replicate the Hammond–Axelrod model of in-group favoritism on a square lattice and then generalize this model on undirected and directed BA networks for both asexual and sexual reproduction cases. Our simulations demonstrate that irrespective of the mode of reproduction, the ethnocentric strategy becomes common even though cooperation is individually costly and mechanisms such as reciprocity or conformity are absent. Moreover, our results indicate that the spread of favoritism towards similar others highly depends on the network topology and the associated heterogeneity of the studied population.

Keywords: Monte Carlo simulation; Complex networks; In-group favoritism; Ethnocentrism; Agent-based model; Evolutionary model (search for similar items in EconPapers)
Date: 2009
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:388:y:2009:i:24:p:4999-5004

DOI: 10.1016/j.physa.2009.08.029

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