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Competitive equilibrium when preferences change over time

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  • Erzo Luttmer
  • Thomas Mariotti

Abstract

We show the existence of a competitive equilibrium in an economy with many consumers whose preferences may change over time. The demand correspondence of an individual consumer is determined by the set of subgame-perfect equilibrium outcomes in his intrapersonal game. For additively separable preferences with concave period utility functions that are unbounded above, this demand correspondence will satisfy the usual boundary conditions. Whenever consumers can recall their own mixed actions, this correspondence is convex-valued. This ensures the existence of a symmetric competitive equilibrium. Copyright Springer-Verlag Berlin/Heidelberg 2006

Suggested Citation

  • Erzo Luttmer & Thomas Mariotti, 2006. "Competitive equilibrium when preferences change over time," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 27(3), pages 679-690, April.
    • Handle: RePEc:spr:joecth:v:27:y:2006:i:3:p:679-690
    DOI: 10.1007/s00199-004-0586-1
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    Cited by:

    1. Cingiz, Kutay & Flesch, János & Herings, P. Jean-Jacques & Predtetchinski, Arkadi, 2016. "Doing it now, later, or never," Games and Economic Behavior, Elsevier, vol. 97(C), pages 174-185.
    2. Dziewulski, Paweł, 2015. "Efficiency of competitive equilibria in economies with time-dependent preferences," Journal of Economic Theory, Elsevier, vol. 159(PA), pages 311-325.
    3. Tommaso Gabrieli & Sayantan Ghosal, 2013. "Non-existence of competitive equilibria with dynamically inconsistent preferences," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 52(1), pages 299-313, January.
    4. Leeat Yariv & David Laibson, 2004. "Safety in Markets: An Impossibility Theorem for Dutch Books," 2004 Meeting Papers 867, Society for Economic Dynamics.
    5. Leeat Yariv, 2004. "Safety in Markets: An Impossibility Theorem for Dutch Books," Theory workshop papers 658612000000000072, UCLA Department of Economics.

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