Noncooperative oligopoly in markets with a continuum of traders and a strongly connected set of commodities

Busetto, F., Codognato, G., Ghosal, S. , Julien, L. and Tonin, S. (2018) Noncooperative oligopoly in markets with a continuum of traders and a strongly connected set of commodities. Games and Economic Behavior, 108, pp. 478-485. (doi: 10.1016/j.geb.2017.01.013)

Abstract

We show the existence of a Cournot–Nash equilibrium for a mixed version of the Shapley window model, where large traders are represented as atoms and small traders are represented by an atomless part. Previous existence theorems for the Shapley window model, provided by Sahi and Yao (1989) in the case of economies with a finite number of traders and by Busetto et al. (2011) in the case of mixed exchange economies, are essentially based on the assumption that there are at least two atoms with strictly positive endowments and indifference curves contained in the strict interior of the commodity space. Our result does not require this restriction. It relies on the characteristics of the atomless part of the economy and exploits the fact that traders belonging to the atomless part have an endogenous “Walrasian” behavior.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Ghosal, Professor Sayantan
• Authors: Busetto, F., Codognato, G., Ghosal, S., Julien, L., and Tonin, S.
• College/School: College of Social Sciences > Adam Smith Business School > Economics
• Journal Name: Games and Economic Behavior
• Publisher: Elsevier
• ISSN: 0899-8256
• ISSN (Online): 1090-2473
• Published Online: 09 February 2017
• Copyright Holders: Copyright © 2017 Elsevier Inc.
• First Published: First published in Games and Economic Behavior 108: 478-485
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher