Universität zu Köln

Lima, F. W. S., Hadzibeganovic, Tarik and Stauffer, Dietrich (2014). Evolution of tag-based cooperation on Erdos-Renyi random graphs. Int. J. Mod. Phys. C, 25 (6). SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD. ISSN 1793-6586

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Abstract

Here, we study an agent-based model of the evolution of tag-mediated cooperation on Erdos-Renyi random graphs. In our model, agents with heritable phenotypic traits play pairwise Prisoner's Dilemma-like games and follow one of the four possible strategies: Ethnocentric, altruistic, egoistic and cosmopolitan. Ethnocentric and cosmopolitan strategies are conditional, i.e. their selection depends upon the shared phenotypic similarity among interacting agents. The remaining two strategies are always unconditional, meaning that egoists always defect while altruists always cooperate. Our simulations revealed that ethnocentrism can win in both early and later evolutionary stages on directed random graphs when reproduction of artificial agents was asexual; however, under the sexual mode of reproduction on a directed random graph, we found that altruists dominate initially for a rather short period of time, whereas ethnocentrics and egoists suppress other strategists and compete for dominance in the intermediate and later evolutionary stages. Among our results, we also find surprisingly regular oscillations which are not damped in the course of time even after half a million Monte Carlo steps. Unlike most previous studies, our findings highlight conditions under which ethnocentrism is less stable or suppressed by other competing strategies.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Lima, F. W. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hadzibeganovic, Tarik UNSPECIFIED UNSPECIFIED UNSPECIFIED Stauffer, Dietrich UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-437696
DOI:	10.1142/S0129183114500065
Journal or Publication Title:	Int. J. Mod. Phys. C
Volume:	25
Number:	6
Date:	2014
Publisher:	WORLD SCIENTIFIC PUBL CO PTE LTD
Place of Publication:	SINGAPORE
ISSN:	1793-6586
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NETWORKS; HUMANS; ALTRUISM; BEHAVIOR; MODEL; GAME Multiple languages Computer Science, Interdisciplinary Applications; Physics, Mathematical Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/43769