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Social Dilemmas and Human Behavior

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Isolating the effect of conditional dissociation on the emergence of cooperation.

(Versión en español aquí)

In previous posts of this blog (here, and here) we have already discussed the effect of reputation and dynamic links on cooperation. Recently, we have performed a series of experiments to explore the effect of information, together with the possibility of changing partners, on the cooperative behavior. In this post, I report on a theoretical study: Leave and let leave: A sufficient condition to explain the evolutionary emergence of cooperation, by Luis Izquierdo, Segismundo Izquierdo and Fernando Vega-Redondo, Journal of Economic Dynamics and Control , 4691–113 (2014). In this study, the authors isolate the effect of conditional dissociation (that is, the possibility of breaking a partnership based on the partner’s behavior) by proposing a model that they solve both analytically, through a mean-field approximation, and numerically. They show that the conditional dissociation mechanism is enough to sustain a significant level of cooperation if the expected lifetime of individuals is sufficiently long.

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