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Coalitions, tipping points and the speed of evolution

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  • Newton, Jonathan
  • Angus, Simon D.

Abstract

This study considers pure coordination games on networks and the waiting time for an adaptive process of strategic change to achieve efficient coordination. Although it is in the interest of every player to coordinate on a single globally efficient norm, coalitional behavior at a local level can greatly slow, as well as hasten convergence to efficiency. For some networks, when one action becomes efficient enough relative to the other, the effect of coalitional behavior changes abruptly from a conservative effect to a reforming effect. These effects are confirmed for a variety of stylized and empirical social networks found in the literature. For coordination games in which the Pareto efficient and risk dominant equilibria differ, polymorphic states can be the only stochastically stable stat es.

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Bibliographic Info

Paper provided by University of Sydney, School of Economics in its series Working Papers with number 2013-02.

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Date of creation: Jan 2013
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Handle: RePEc:syd:wpaper:2123/8895

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Keywords: social networks; networks; conservatism; reform; social norm; coalition; learning; Stochastic stability; Evolution;

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