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Barter and Monetary Exchange Under Private Information

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  • Steve Williamson
  • Randall Wright

Abstract

We analyze economies with private information concerning the quality of commodities. Without private information there is a nonmonetary equilibrium with only high quality commodities produced, and money cannot improve welfare. With private information there can be equilibria with bad quality commodities produced, and sometimes only nonmonetary equilibrium is degenerate. The use of money can lead to active (i.e., nondegenerate) equilibria when no active nonmonetary equilibrium exists. Even when active nonmonetary equilibria exist, with private information money can increase welfare via its incentive effects: in monetary equilibrium, agents may adopt trading strategies that discourage production of low quality output.
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Suggested Citation

  • Steve Williamson & Randall Wright, 1991. "Barter and Monetary Exchange Under Private Information," University of Western Ontario, Departmental Research Report Series 9107, University of Western Ontario, Department of Economics.
    • Handle: RePEc:uwo:uwowop:9107
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