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

David Collie

No 268387, Economic Research Papers from University of Warwick - Department of Economics

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.

Keywords: International Relations/Trade; Research Methods/ Statistical Methods (search for similar items in EconPapers)
Date: 1990-05-05
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Related works:
Journal Article: International Trade and Cournot Equilibrium: Existence, Uniqueness and Comparative Statics (1992)
Working Paper: INTERNATIONAL TRADE AND COURNOT EQUILIBRIUM: EXISTENCE, UNIQUENESS AND COMPARATIVE STATICS (1990) Downloads
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