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Mechanisms for similarity based cooperation

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  • A. Traulsen

Abstract

Cooperation based on similarity has been discussed since Richard Dawkins introduced the term “green beard” effect. In these models, individuals cooperate based on an aribtrary signal (or tag) such as the famous green beard. Here, two different models for such tag based cooperation are analysed. As neutral drift is important in both models, a finite population framework is applied. The first model, which we term “cooperative tags” considers a situation in which groups of cooperators are formed by some joint signal. Defectors adopting the signal and exploiting the group can lead to a breakdown of cooperation. In this case, conditions are derived under which the average abundance of the more cooperative strategy exceeds 50%. The second model considers a situation in which individuals start defecting towards others that are not similar to them. This situation is termed “defective tags”. It is shown that in this case, individuals using tags to cooperate exclusively with their own kind dominate over unconditional cooperators. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Suggested Citation

  • A. Traulsen, 2008. "Mechanisms for similarity based cooperation," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 63(3), pages 363-371, June.
    • Handle: RePEc:spr:eurphb:v:63:y:2008:i:3:p:363-371
    DOI: 10.1140/epjb/e2008-00031-3
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    Citations

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    Cited by:

    1. Hadzibeganovic, Tarik & Liu, Chao & Li, Rong, 2021. "Effects of reproductive skew on the evolution of ethnocentrism in structured populations with variable size," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 568(C).
    2. Barreira da Silva Rocha, André & Laruelle, Annick, 2012. "Evolution of Cooperation in the Snowdrift Game with Incomplete Information and Heterogeneous Population," IKERLANAK 2012-62, Universidad del País Vasco - Departamento de Fundamentos del Análisis Económico I.
    3. Fukutomi, Masao & Kurokawa, Shun, 2018. "How much cost should reciprocators pay in order to distinguish the opponent's cooperation from the opponent's defection?," Applied Mathematics and Computation, Elsevier, vol. 336(C), pages 301-314.
    4. Yutaka Nakai, 2014. "In-group favoritism due to friend selection strategies based on fixed tag and within-group reputation," Rationality and Society, , vol. 26(3), pages 320-354, August.
    5. André Barreira da Silva Rocha & Annick Laruelle, 2012. "Evolution of Cooperation in the Snowdrift Game with Incomplete Information and Heterogeneous Population," Discussion Papers in Economics 12/12, Division of Economics, School of Business, University of Leicester, revised Sep 2012.
    6. Zhang, Hong, 2023. "Evolution of cooperation with tag-based expulsion in spatial public goods game," Chaos, Solitons & Fractals, Elsevier, vol. 174(C).

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