On the Stabilizing Virtues of Imperfect Competition

Thomas Seegmuller (1)

1 EUREQUA - Equipe Universitaire de Recherche en Economie Quantitative

We analyze the stabilizing role of imperfect competition on fluctuations due to indeterminacy and endogenous cycles. In this paper, imperfect competition is a source of monopoly profits, because of producer market power. Considering an
overlapping generations model with capital accumulation and elastic labor supply, we show that under imperfect competition, the emergence of endogenous fluctuations requires a weaker substitution between production factors
than under perfect competition. In this sense, imperfect competition stabilizes fluctuations. However, we find an opposite conclusion concerning the elasticity of labor supply. Indeed, endogenous fluctuations are compatible with a less elastic labor supply under imperfect competition.

Mots clés: Indeterminacy; endogenous fluctuations; imperfect<br />competition; monopoly profits; mark-up

Domaines: Economies et finances

Thomas Seegmuller. On the Stabilizing Virtues of Imperfect Competition. International Journal of Economic Theory, 2005, 1 (4), pp.313-323. ⟨10.1111/j.1742-7363.2005.00019.x⟩. ⟨halshs-00194173⟩