International trade and cournot equilibrium: existence, uniqueness and comparative statics

Collie, David ORCID: https://orcid.org/0000-0002-3132-648X 1992. International trade and cournot equilibrium: existence, uniqueness and comparative statics. Bulletin of Economic Research 44 (1) , pp. 55-66. 10.1111/j.1467-8586.1992.tb00506.x

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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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Business (Including Economics)
Publisher:	Wiley
ISSN:	0307-3378
Date of Acceptance:	1 October 1990
Last Modified:	03 Nov 2022 10:11
URI:	https://orca.cardiff.ac.uk/id/eprint/107208

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