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Contagion

  • Morris, Stephen

Each player in an infinite population interacts strategically with a finite subset of that population. Suppose each player's binary choice in each period is a best response to the population choices of the previous period. When can behaviour that is initially played by only a finite set of player spread to the whole population? This paper characterizes when such contagion is possible for arbitrary local interaction systems. Maximal contagion occurs when local interaction is sufficiently uniform and there is low neighbour growth, i.e. the number of players who can be reached in k steps does not grow exponentially in k. Copyright 2000 by The Review of Economic Studies Limited

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Article provided by Wiley Blackwell in its journal Review of Economic Studies.

Volume (Year): 67 (2000)
Issue (Month): 1 (January)
Pages: 57-78

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Handle: RePEc:bla:restud:v:67:y:2000:i:1:p:57-78
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  1. George J. mailath & Larry Samuelson & Avner Shaked, . "Correlated Equilibria and Local Interactions," ELSE working papers 030, ESRC Centre on Economics Learning and Social Evolution.
  2. Glen Ellison, 2010. "Learning, Local Interaction, and Coordination," Levine's Working Paper Archive 391, David K. Levine.
  3. John C. Harsanyi & Reinhard Selten, 1988. "A General Theory of Equilibrium Selection in Games," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262582384, June.
  4. Mailath, G.J. & Samuelson, L. & Shaked, A., 1994. "Evolution and Endogenous Interations," Working papers 9426, Wisconsin Madison - Social Systems.
  5. Sugden, Robert, 1995. "The coexistence of conventions," Journal of Economic Behavior & Organization, Elsevier, vol. 28(2), pages 241-256, October.
  6. S. Morris & R. Rob & H. Shin, 2010. "p-dominance and Belief Potential," Levine's Working Paper Archive 505, David K. Levine.
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