Journal Of The Econometric Society

An International Society for the Advancement of Economic
Theory in its Relation to Statistics and Mathematics

Edited by: Guido W. Imbens • Print ISSN: 0012-9682 • Online ISSN: 1468-0262

Econometrica: Sep, 1981, Volume 49, Issue 5

Nash Equilibrium and the Industrial Organization of Markets with Large Fixed Costs<1149:NEATIO>2.0.CO;2-J
p. 1149-1172

Sanford J. Grossman

Cournot-Nash models of free entry into industries with large fixed costs yields equilibria with only a few operating firms, and each firm has some monopoly power. I consider a model where each firm's strategy is a function q(P) which specifies how much it will supply at each price. Unlike in Cournot models, the competitive equilibrium (where it exists) is always a Nash equilibrium in supply function strategies, and under weak assumptions it is the only equilibrium. This permits a Nash equilibrium model of the threat of entry as a deterrent to the exercise of monopoly power by operating firms.

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