Quantity Precommitment and Bertrand Competition Yield Cournot Outcomes

David Kreps and Jose Scheinkman

Bell Journal of Economics, 1983, vol. 14, issue 2, 326-337

Abstract: Bertrand's model of oligopoly, which gives perfectly competitive outcomes assumes that: (1) there is competition over prices and (2) production follows the realization of demand. We show that both of these assumptions are required. More precisely, consider a two-stage oligopoly game where, first, there is simultaneous production, and second, after production levels are made public, there is price competition. Under mild assumptions about demand, the unique equilibrium outcome is the Cournot outcome. This illustrates that solutions to oligopoly games depend on both the strategic variables employed and the context (game form) in which those variables are employed.

Date: 1983
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