Act Talk - Francisco Santos: Evolutionary Dynamics of Collective Actions
by Advanced-Concepts-Team on Oct 15, 2012
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Throughout their life, humans often engage in collective endeavors ranging from family related issues to global warming. In all cases, the tragedy of the commons threatens the possibility of reaching ...
Throughout their life, humans often engage in collective endeavors ranging from family related issues to global warming. In all cases, the tragedy of the commons threatens the possibility of reaching the optimal solution associated with global cooperation, a scenario predicted by theory and demonstrated by many experiments. From a theoretical point of view, Life is often a matter of payoffs, fitness and competition, just like a game, which makes evolutionary game theory the best tool to study conflicts of interest in populations of different types and at all scales. In this framework, I will address two important aspects of evolutionary dynamics that have been neglected so far in the context of public goods games and evolution of cooperation. On the one hand, the fact that often a minimum number of contributors are needed to achieve collective benefits, providing a new and rich pattern of evolutionary dynamics where the direction of natural selection can be inverted and cooperation enhanced. On the other hand, the fact that individuals are often participating in several games, related to the their social context and pattern of social ties, defined by a social network. In this case, cooperation blooms when both wealth and social ties follow a power-law distribution, providing clues on the self-organization of social communities and their economical implications.
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