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Économétrie de la concurrence entre produits différenciés : théorie et méthodes empiriques

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  • Bonnet, Céline

    (Toulouse School of Economics, GREMAQ, INRA)

Abstract

Econometrics of Competition between Differentiated Products: Theory and Empirical Methods. The evolution of the industrial concentration has lead to a change in the relationships between manufacturers and retailers. This paper focuses on the measure of market power and the analysis of the competitive interactions between manufacturers and retailers. The analysis of horizontal and vertical relationships is based on structural econometric methods. To measure the market power, price-cost margins at manufacturers and retailers levels are recovered from demand estimated parameters and different hypothesis of strategic interactions are tested. This paper proposes a survey of this literature where discrete choice models, such as multinomial logit models, the modelisation of strategic vertical interactions and non-nested tests for competing models are developped. La concentration industrielle n’a cessé d’augmenter ces 20 dernières années. Cette concentration est présente autant chez les producteurs que chez les distributeurs. Il est donc devenu primordial de mesurer le pouvoir de marché des différents acteurs et d’analyser les interactions concurrentielles entre ces divers intermédiaires. Les méthodes d’économétrie structurelle permettent de mesurer empiriquement ce pouvoir de marché. Cet article propose donc une revue de la littérature sur les méthodologies structurelles permettant d’estimer les marges des acteurs du marché à partir de paramètres estimés de la demande et de tester différentes interactions stratégiques entre les membres de l’industrie. L’objectif est de faire le point sur les modèles utilisés pour estimer la demande, en l’occurrence les modèles de choix discrets tels que les logit multinomiaux, et de résumer les méthodes permettant d’obtenir les paramètres structurels des modèles de concurrence oligopolistique entre distributeurs et producteurs. Nous présenterons également les développements récents de la modélisation des interactions stratégiques et des relations verticales entre producteurs et distributeurs ainsi que les méthodes permettant de tester différentes hypothèses sur les relations horizontales et verticales.

Suggested Citation

  • Bonnet, Céline, 2007. "Économétrie de la concurrence entre produits différenciés : théorie et méthodes empiriques," L'Actualité Economique, Société Canadienne de Science Economique, vol. 83(4), pages 555-580, décembre.
  • Handle: RePEc:ris:actuec:v:83:y:2007:i:4:p:555-580
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    More about this item

    JEL classification:

    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • C12 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Hypothesis Testing: General
    • C15 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Statistical Simulation Methods: General
    • C35 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Discrete Regression and Qualitative Choice Models; Discrete Regressors; Proportions

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