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International Trade and Cournot Equilibrium: Existence, Uniqueness and Comparative Statics

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Collie, David

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Abstract

This paper proves the existence and uniqueness of Cournot equilibrium in models of international trade under oligopoly. The existence of Cournot equilibrium is established without the usual assumption that profit functions are concave. Instead the proof uses a weaker "aggregate concavity" condition. A simple proof is used to establish the uniqueness of the equilibrium. And, the paper considers the implications of the assumptions, used to prove the existence and uniqueness of the equilibrium, on the comparative static results. Copyright 1992 by Blackwell Publishing Ltd and the Board of Trustees of the Bulletin of Economic Research

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Publisher Info
Article provided by Blackwell Publishing in its journal Bulletin of Economic Research.

Volume (Year): 44 (1992)
Issue (Month): 1 (January)
Pages: 55-66
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Handle: RePEc:bla:buecrs:v:44:y:1992:i:1:p:55-66

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  1. Udo Broll, Peter Welzel, Kit Pong Wong, 1999. "Strategic Hedging," Working Paper Series B 1999-04, Friedrich-Schiller-Universit�t Jena, Wirtschaftswissenschaftliche Fakult�t. [Downloadable!]
  2. Aidan Hollis, 2003. "Industrial Concentration, Output, and Trade: An Empirical Exploration," Review of Industrial Organization, Springer, vol. 22(2), pages 103-119, March. [Downloadable!] (restricted)
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  3. R Cornes & R Hartley, 2005. "The Geometry of Aggregative Games," The School of Economics Discussion Paper Series 0514, Economics, The University of Manchester. [Downloadable!]
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