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Commodity money with frequent search

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  • Ezra Oberfield
  • Nicholas Trachter

Abstract

A prominent feature of the Kiyotaki and Wright (1989) model of commodity money is the multiplicity of dynamic equilibria. We show that the frequency of search is strongly related to the extent of multiplicity. To isolate the role of frequency of search in generating multiplicity, we (i) vary the frequency of search without changing the frequency of finding a trading partner and (ii) focus on symmetric dynamic equilibria, a class for which we can sharply characterize several features of the set of equilibria. For any finite frequency of search this class retains much of the multiplicity. For each frequency we characterize the full set of equilibrium payoffs, strategies played and dynamic paths of the state variables. Indexed by any of these features, the set of equilibria converges uniformly to a unique equilibrium in the continuous search limit. We conclude that when search is frequent, the seemingly exotic dynamics are irrelevant.

Suggested Citation

  • Ezra Oberfield & Nicholas Trachter, 2010. "Commodity money with frequent search," Working Paper Series WP-2010-22, Federal Reserve Bank of Chicago.
  • Handle: RePEc:fip:fedhwp:wp-2010-22
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    1. Jovanovic, Boyan & Rosenthal, Robert W., 1986. "Anonymous Sequential Games," Working Papers 86-12, C.V. Starr Center for Applied Economics, New York University.
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    Cited by:

    1. repec:eee:jetheo:v:172:y:2017:i:c:p:423-450 is not listed on IDEAS
    2. Kindler, A. & Bourgeois-Gironde, S. & Lefebvre, G. & Solomon, S., 2017. "New leads in speculative behavior," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 467(C), pages 365-379.

    More about this item

    Keywords

    Money ; Markov processes;

    JEL classification:

    • E00 - Macroeconomics and Monetary Economics - - General - - - General
    • E40 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - General
    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness
    • C73 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Stochastic and Dynamic Games; Evolutionary Games

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