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 each situation converge to each other at a rate of 1/N as the market becomes large. The approximation 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/ root N 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 C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 7025.
Date of creation: Oct 2008
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Other versions of this item:
- Kovalenkov, Alexander & Vives, Xavier, 2014. "Competitive rational expectations equilibria without apology," Journal of Economic Theory, Elsevier, vol. 149(C), pages 211-235.
- Alexander Kovalenkov & Xavier Vives, 2008. "Competitive Rational Expectations Equilibria without Apology," CESifo Working Paper Series 2446, CESifo Group Munich.
- 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; Trading Volume; Bond Interest Rates
This paper has been announced in the following NEP Reports:
- NEP-ALL-2009-02-28 (All new papers)
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