NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Dynamic General Equilibrium Models with Imperfectly Competitive Product Markets

Julio J. Rotemberg, Michael Woodford

NBER Working Paper No. 4502
Issued in October 1993
NBER Program(s):   EFG

This paper discusses the consequences of introducing imperfectly competitive product markets into an otherwise standard neoclassical growth model. We pay particular attention to the consequences of imperfect competition for the explanation of fluctuations in aggregate economic activity. Market structures considered include monopolistic competition, the 'customer market' model of Phelps and Winter, and the implicit collusion model of Rotemberg and Saloner. Empirical evidence relevant to the numerical calibration of imperfectly competitive models is reviewed. The paper then analyzes the effects of imperfect competition upon the economy's response to several kinds of real shocks, including technology shocks, shocks to the level of government purchases, and shocks that change individual producers' degree of market power. It also discusses the role of imperfect competition in allowing for fluctuations due solely to self-fulfilling expectations.

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Document Object Identifier (DOI): 10.3386/w4502

Published: Frontiers of Business Cycle Research, Cooley, T., ed., Princeton: Princeton University Press, 1995.

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