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Bertrand competition with intertemporal demand

Prajit Kumar Dutta; Alexander Matros; Jorgen W. Weibull

Title:
Bertrand competition with intertemporal demand
Author(s):
Dutta, Prajit Kumar
Matros, Alexander
Weibull, Jorgen W.
Date:
Type:
Working papers
Department:
Economics
Permanent URL:
Series:
Department of Economics Discussion Papers
Part Number:
0102-17
Publisher:
Department of Economics, Columbia University
Publisher Location:
New York
Abstract:
In the text-book model of dynamic Bertrand competition, competing firms meet the same demand function every period. This is not a satisfactory model of the demand side if consumers can make intertemporal substitution between periods. Each period then leaves some residual demand to future periods, and consumers who observe price under-cutting may correctly anticipate an ensuing price war and therefore postpone their purchases. Such intertemporal substitution affects the profit to a deviating firm. Accordingly, the interaction between the firms no longer constitutes a repeated game, and hence falls outside the domain of the usual Folk theorems. We analyze collusive pricing in such situations, and study cases when consumers have perfect and imperfect foresight, and when they are more or less patient than the firms. It turns out that collusion against patient and forwardlooking consumers is easier to sustain than collusion in the text-book model.
Subject(s):
Economic theory
Item views:
174
Metadata:
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