Competitive Rational Expectations Equilibria without Apology
AbstractIn a standard financial market model with asymmetric information with a finite number N of risk-averse informed traders, competitive rational expectations equilibria provide a good approximation to strategic equilibria as long as N is not too small: equilibrium prices in eachsituation converge to each other at a rate of 1/N as the market becomes large. Theapproximation is particularly good when the informationally adjusted risk bearing capacity of traders is not very large. This is not the case if informed traders are close to risk neutral. Both equilibria converge to the competitive equilibrium of an idealized limit continuum economy as the market becomes large at a slower rate of 1/ãN and, therefore, the limit equilibrium need not be a good approximation of the strategic equilibrium in moderately large markets.
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Bibliographic InfoPaper provided by CESifo Group Munich in its series CESifo Working Paper Series with number 2446.
Date of creation: 2008
Date of revision:
gschizophreniah problem; strategic equilibrium; large markets; information acquisition; free entry; rate of convergence;
Other versions of this item:
- Kovalenkov, Alex & Vives, Xavier, 2008. "Competitive Rational Expectations Equilibria Without Apology," CEPR Discussion Papers 7025, C.E.P.R. Discussion Papers.
- D41 - Microeconomics - - Market Structure and Pricing - - - Perfect Competition
- D43 - Microeconomics - - Market Structure and Pricing - - - Oligopoly and Other Forms of Market Imperfection
- G10 - Financial Economics - - General Financial Markets - - - General (includes Measurement and Data)
- G12 - Financial Economics - - General Financial Markets - - - Asset Pricing
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- Grossman, Sanford J & Stiglitz, Joseph E, 1980.
"On the Impossibility of Informationally Efficient Markets,"
American Economic Review,
American Economic Association, vol. 70(3), pages 393-408, June.
- Sanford J Grossman & Joseph E Stiglitz, 1997. "On the Impossibility of Informationally Efficient Markets," Levine's Working Paper Archive 1908, David K. Levine.
- Yosha, Oved, 1997. "Diversification and Competition: Financial Intermediation in a Large Cournot-Walras Economy," Journal of Economic Theory, Elsevier, vol. 75(1), pages 64-88, July.
- Xavier Vives, 1994.
"Short-term Investment and the Informational Efficiency of the Market,"
CEPR Financial Markets Paper
0034, European Science Foundation Network in Financial Markets, c/o C.E.P.R, 77 Bastwick Street, London EC1V 3PZ.
- Vives, Xavier, 1995. "Short-Term Investment and the Informational Efficiency of the Market," Review of Financial Studies, Society for Financial Studies, vol. 8(1), pages 125-60.
- Vives, X., 1993. "Short-Term Investment and the Informational Efficiency of the Market," UFAE and IAE Working Papers 207.93, Unitat de Fonaments de l'Anàlisi Econòmica (UAB) and Institut d'Anàlisi Econòmica (CSIC).
- Martin W. Cripps & Jeroen M. Swinkels, 2006.
"Efficiency of Large Double Auctions,"
Econometric Society, vol. 74(1), pages 47-92, 01.
- Aldo Rustichini, 1992.
"Convergence to Efficiency in a Simple Market with Incomplete Information,"
995, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- Rustichini, Aldo & Satterthwaite, Mark A & Williams, Steven R, 1994. "Convergence to Efficiency in a Simple Market with Incomplete Information," Econometrica, Econometric Society, vol. 62(5), pages 1041-63, September.
- Biais, Bruno & Martimort, David & Rochet, Jean-Charles, 1998.
"Competing Mechanisms in a Commun Value Environment,"
IDEI Working Papers
75, Institut d'Économie Industrielle (IDEI), Toulouse.
- Bruno Biais & David Martimort & Jean-Charles Rochet, 2000. "Competing Mechanisms in a Common Value Environment," Econometrica, Econometric Society, vol. 68(4), pages 799-838, July.
- Admati, Anat R, 1985. "A Noisy Rational Expectations Equilibrium for Multi-asset Securities Markets," Econometrica, Econometric Society, vol. 53(3), pages 629-57, May.
- Hellwig, Martin F., 1980. "On the aggregation of information in competitive markets," Journal of Economic Theory, Elsevier, vol. 22(3), pages 477-498, June.
- Leland, Hayne E, 1992.
"Insider Trading: Should It Be Prohibited?,"
Journal of Political Economy,
University of Chicago Press, vol. 100(4), pages 859-87, August.
- Kyle, Albert S, 1989. "Informed Speculation with Imperfect Competition," Review of Economic Studies, Wiley Blackwell, vol. 56(3), pages 317-55, July.
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