Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.8/1277
Título: Effects of asynchronism on evolutionary games
Autor: Grilo, Carlos
Correia, Luís
Palavras-chave: Evolutionary game theory
Evolutionary games
Structured populations
Artificial life
Data: 2011
Citação: Grilo, Carlos; Correia, Luís. 2011. "Effects of asynchronism on evolutionary games", Journal of Theoretical Biology 269, 1: 109 - 122.
Resumo: We analyze the influence of the update dynamics on symmetric 2-player evolutionary games, which are among the most used tools to study the emergence of cooperation in populations of interacting agents. A synchronous dynamics means that, at each time step, all the agents of the population update their strategies simultaneously. An extreme case of asynchronism is sequential dynamics, in which only one agent is updated each time. We first show that these two opposite update dynamics can lead to very different outcomes and that sequential dynamics is detrimental to the emergence of cooperation only when the probability of imitating the most successful neighbors is high. In this sense, we can say that, when the update dynamics has some influence, in general asynchronism is beneficial to the emergence of cooperation.Wethen explore the consequences of using intermediate levels of asynchronism, where only a fraction of the agents update their behavior each time. In general, the level of cooperation changes smoothly and monotonically as we gradually go from synchronous to sequential dynamics. However, there are some exceptions that should be taken into account. In addition, the results show that the possibility of agents taking irrational decisions has a key role in the sensitivity of thesemodels to changes in the update dynamics. Explanations for the observed behaviors are advanced.
Peer review: yes
URI: http://hdl.handle.net/10400.8/1277
DOI: 10.1016/j.jtbi.2010.10.022
ISSN: 0022-5193
Aparece nas colecções:Artigos em revistas internacionais

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