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Allocative and Productive Efficiency in REE with Asymmetric Information

  • Messner, Simon
  • Vives, Xavier

We characterize the divergence between in informational and economic efficiency in a rational expectations competitive market with asymmetric information about the costs of production. We find that prices may contain too much or too little information with respect o incentive efficient allocations depending on whether the main role of the price is, respectively, the traditional as index of scarcity or informational. Only when REE degenerate to Cournot equilibria, does the market solution not show allocative inefficiency. With multidimensional uncertainty we find that the REE price does not, in general, have the incentive efficient information mix: it pays to sacrifice allocative efficiency at the REE to improve productive efficiency.

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Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 2678.

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Date of creation: Jan 2001
Date of revision:
Handle: RePEc:cpr:ceprdp:2678
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  1. Vives, Xavier, 1988. "Aggregation of Information in Large Cournot Markets," Econometrica, Econometric Society, vol. 56(4), pages 851-76, July.
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  13. Blume, Lawrence & Easley, David, 1990. "Implementation of Walrasian expectations equilibria," Journal of Economic Theory, Elsevier, vol. 51(1), pages 207-227, June.
  14. Sanford J Grossman & Joseph E Stiglitz, 1997. "On the Impossibility of Informationally Efficient Markets," Levine's Working Paper Archive 1908, David K. Levine.
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  17. Laffont, Jean-Jacques M, 1985. "On the Welfare Analysis of Rational Expectations Equilibria with Asymmetric Information," Econometrica, Econometric Society, vol. 53(1), pages 1-29, January.
  18. Judd, Kenneth L., 1985. "The law of large numbers with a continuum of IID random variables," Journal of Economic Theory, Elsevier, vol. 35(1), pages 19-25, February.
  19. Postlewaite, Andrew & Schmeidler, David, 1986. "Implementation in differential information economies," Journal of Economic Theory, Elsevier, vol. 39(1), pages 14-33, June.
  20. Anderson, Robert M. & Sonnenschein, Hugo, 1982. "On the existence of rational expectations equilibrium," Journal of Economic Theory, Elsevier, vol. 26(2), pages 261-278, April.
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  22. Holmstrom, Bengt & Myerson, Roger B, 1983. "Efficient and Durable Decision Rules with Incomplete Information," Econometrica, Econometric Society, vol. 51(6), pages 1799-819, November.
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