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Concurrence imparfaite, variabilité du taux de marge et fluctuations endogènes

Published online by Cambridge University Press:  17 August 2016

Thomas Seegmuller
Thomas Seegmuller*
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Résumé

Nous étudions l'émergence de fluctuations endogènes dans un modèle à générations imbriquées dans lequel les producteurs se livrent une concurrence à la Cournot avec libre entrée. L'économie est caractérisée par un taux de marge variable et des rendements croissants. Nous analysons l'influence de la variabilité du taux de marge et du niveau des rendements croissants sur l'indétermination locale de l'équilibre stationnaire et l'existence de cycles endogènes. Nous montrons que des fluctuations endogènes stochastiques et déterministes peuvent émerger si les rendements sont faiblement croissants et sont proches des rendements constants. Par ailleurs, de telles fluctuations peuvent apparaître lorsque la demande de travail est décroissante et a une pente inférieure à celle de l'offre de travail.

Summary

Summary

We study the emergence of endogenous fluctuations in an overlapping generations model where there is Cournot competition with free entry. The mark-up is variable and the returns to scale are increasing. We analyze the role of mark-up variability and increasing returns on the local indeterminacy and on the occurrence of endogenous cycles. We show that endogenous deterministic and stochastic fluctuations can emerge if the increasing returns are small and closed to constant returns. Moreover such fluctuations can appear when the labor demand is decreasing and has a slope weaker than the labor supply.

Keywords

Fluctuations endogènesconcurrence imparfaitevariabilité du taux de margeD43E32Endogenous fluctuationsimperfect competitionmark-up variabilityD43E32
Type
Research Article
Information
Recherches Économiques de Louvain/ Louvain Economic Review , Volume 69 , Issue 4 , 2003 , pp. 371 - 386
Copyright
Copyright © Université catholique de Louvain, Institut de recherches économiques et sociales 2003 

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Footnotes

*

Je tiens à remercier Antoine d'Autume, Francesco De Palma, Rodolphe Dos Santos Ferreira, Teresa Lloyd-Braga, Isabelle Maret, Hubert Stahn, Alain Venditti et les rapporteurs pour leurs commentaires et leurs suggestions. Les erreurs et omissions qui pourraient subsister sont de la seuie responsabilité de I'auteur.

**

Université Louis Pasteur, 61, avenue de la Forêt-Noire, 67085 Strasbourg Cedex, France, Tel: (33) 3 90 24 20 98, Fax: (33) 3 90 24 20 71, e-mail: [email protected]

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