IDEAS home Printed from https://ideas.repec.org/a/prs/reveco/reco_0035-2764_1978_num_29_3_408396.html
   My bibliography  Save this article

Indices de concentration et pouvoir de monopole

Author

Listed:
  • David Encaoua
  • Alexis Jacquemin

Abstract

[eng] which all measures of concentration and indexes of aggregate monopoly power derived from the Lerner index, should possess. On this theoretical basis, they have demonstrated that within the confines of varions oligopoly models (non-cooperative Cournot-Nash, price leadership, differentiated oligopoly models), the main measures of concentration, including the entropy measure, can be related to indexes of aggregate degree of monopoly. Using the property of the entropy measure according to which it can be decomposed into additive elements, the authors have also disentangled the respective roles of concentration within a class of firms (or products) and between classes, in the determination of mono­poly power. [fre] En dépit du recours habituel, en économie industrielle, aux mesures de concen­tration industrielle comme moyen d'estimer empiriquement le pouvoir de mono­pole, il n'exista pas d'analyse théorique qui établisse un lien général entre indices de concentration et degré de monopole. Les auteurs de cet article ont d'abord explicité certaines propriétés que doivent vérifier une mesure de concentration et une expression du pouvoir de monopole global au sein d'une branche composée de producteurs ayant chacun un taux de marge bénéficiaire mesuré par l'indice de Lerner. Sur cette base, ils montrent ensuite que la plupart des mesures de concentration, y compris l'entropie pour laquelle il n'existait pas jusqu'ici de justification théorique, ont un lien direct avec le degré de monopole, dans le cas de plusieurs modèles de concurrence oligopolistiquqe (modèles de Cournot-Nash, de la firme dominante, de l'oligopole différencié). Le recours à la propriété entropique de décomposition leur permet également de distinguer entre le rôle de la concentration au sein d'une classe (de firmes ou de produits) et le rôle de la concentration entre les classes, pour déterminer le pouvoir de monopole existant dans une branche.

Suggested Citation

  • David Encaoua & Alexis Jacquemin, 1978. "Indices de concentration et pouvoir de monopole," Revue Économique, Programme National Persée, vol. 29(3), pages 514-537.
  • Handle: RePEc:prs:reveco:reco_0035-2764_1978_num_29_3_408396
    DOI: 10.3406/reco.1978.408396
    Note: DOI:10.3406/reco.1978.408396
    as

    Download full text from publisher

    File URL: https://doi.org/10.3406/reco.1978.408396
    Download Restriction: Data and metadata provided by Persée are licensed under a Creative Commons "Attribution-Noncommercial-Share Alike 3.0" License http://creativecommons.org/licenses/by-nc-sa/3.0/

    File URL: https://www.persee.fr/doc/reco_0035-2764_1978_num_29_3_408396
    Download Restriction: Data and metadata provided by Persée are licensed under a Creative Commons "Attribution-Noncommercial-Share Alike 3.0" License http://creativecommons.org/licenses/by-nc-sa/3.0/

    File URL: https://libkey.io/10.3406/reco.1978.408396?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. repec:bla:econom:v:43:y:1976:i:171:p:267-74 is not listed on IDEAS
    2. Saving, Thomas R, 1970. "Concentration Ratios and the Degree of Monopoly," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 11(1), pages 139-146, February.
    3. Alex Jacquemin, 1975. "Une mesure entropique de la diversification des entreprises," Revue Économique, Programme National Persée, vol. 26(5), pages 834-838.
    4. A. P. Lerner, 1934. "The Concept of Monopoly and the Measurement of Monopoly Power," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 1(3), pages 157-175.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Pascal Monier, 1998. "Ajustement structurel et modification de la structure d'exportations primaires des pays en développement," Revue Tiers Monde, Programme National Persée, vol. 39(156), pages 793-817.
    2. Jean-Pascal Simonin, 1980. "Indices de concentration, pouvoir de monopole et variations conjecturales : quelques extensions," Revue Économique, Programme National Persée, vol. 31(1), pages 121-135.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Bai, Chong-En & Mao, Jie & Zhang, Qiong, 2014. "Measuring market concentration in China: the problem with using censored data and its rectification," China Economic Review, Elsevier, vol. 30(C), pages 432-447.
    2. Neukirch Arne & Wein Thomas, 2019. "Price Gouging at the Pump? The Lerner Index and the German Fuel Market," Review of Economics, De Gruyter, vol. 70(2), pages 157-192, August.
    3. Alexander M. Goulielmos & Giannis Sitzimis, 2012. "Measuring Market Concentration in the Aegean Ferry System," SPOUDAI Journal of Economics and Business, SPOUDAI Journal of Economics and Business, University of Piraeus, vol. 62(1-2), pages 7-27, January -.
    4. de Vany, Arthur & Kim, Cassey Lee Hong, 2003. "Stochastic Market Structure: Concentration Measures and Motion Picture Antitrust," Centre on Regulation and Competition (CRC) Working papers 30701, University of Manchester, Institute for Development Policy and Management (IDPM).
    5. Thomas Hazlett & Dennis Weisman, 2011. "Market Power in US Broadband Services," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 38(2), pages 151-171, March.
    6. Nicola Giocoli, 2012. "Who Invented the Lerner Index? Luigi Amoroso, the Dominant Firm Model, and the Measurement of Market Power," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 41(3), pages 181-191, November.
    7. Donna, Javier D. & Pereira, Pedro & Trindade, Andre & Yoshida, Renan C., 2020. "Direct-to-Consumer Sales by Manufacturers and Bargaining," MPRA Paper 105773, University Library of Munich, Germany.
    8. Manthos D. Delis & Sotirios Kokas & Steven Ongena, 2016. "Foreign Ownership and Market Power in Banking: Evidence from a World Sample," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 48(2-3), pages 449-483, March.
    9. Roland Kirstein & Matthias Peiss, 2013. "Quantitative Machtkonzepte in der Ökonomik," FEMM Working Papers 130004, Otto-von-Guericke University Magdeburg, Faculty of Economics and Management.
    10. Lukáš Čechura & Tinoush Jamali Jaghdani, 2021. "Market Imperfections within the European Wheat Value Chain: The Case of France and the United Kingdom," Agriculture, MDPI, vol. 11(9), pages 1-21, August.
    11. Abdul Latif Alhassan & Nicholas Biekpe, 2017. "Liberalization Outcomes and Competitive Behaviour in an Emerging Insurance Market," African Development Review, African Development Bank, vol. 29(2), pages 122-138, June.
    12. Andrade de Sá, Saraly & Daubanes, Julien, 2016. "Limit pricing and the (in)effectiveness of the carbon tax," Journal of Public Economics, Elsevier, vol. 139(C), pages 28-39.
    13. Shawn W Ulrick & Mark D Williams, 2024. "“Multi-Product Critical Loss: Allowing for Varying Margins, Prices, and Quantities in the Candidate Antitrust Market”," Journal of Competition Law and Economics, Oxford University Press, vol. 20(1-2), pages 60-84.
    14. Hernán Vallejo, 2007. "A generalized index of market power," Revista de Economía del Rosario, Universidad del Rosario, December.
    15. Cincera, Michele & Ince, Ela & Santos, Anabela, 2024. "Revisiting the innovation-competition nexus: Evidence from worldwide manufacturing and service industries," Structural Change and Economic Dynamics, Elsevier, vol. 69(C), pages 586-603.
    16. Hong, Junjie & Shi, Fangyuan & Zheng, Yuhan, 2023. "Does network infrastructure construction reduce energy intensity? Based on the “Broadband China” strategy," Technological Forecasting and Social Change, Elsevier, vol. 190(C).
    17. Michael Reksulak & William F. Shughart & Robert D. Tollison, 2008. "Innovation and the opportunity cost of monopoly," Managerial and Decision Economics, John Wiley & Sons, Ltd., vol. 29(8), pages 619-627.
    18. Fernandes, Ana P. & Ferreira, Priscila & Alan Winters, L., 2014. "Firm entry deregulation, competition and returns to education and skill," European Economic Review, Elsevier, vol. 70(C), pages 210-230.
    19. Paul Latreille & James Mackley, 2011. "Using Excel to Illustrate Hannah and Kay's Concentration Axioms," International Review of Economic Education, Economics Network, University of Bristol, vol. 10(1), pages 117-127.
    20. Mourdoukoutas, Fotios & Boonen, Tim J. & Koo, Bonsoo & Pantelous, Athanasios A., 2021. "Pricing in a competitive stochastic insurance market," Insurance: Mathematics and Economics, Elsevier, vol. 97(C), pages 44-56.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:prs:reveco:reco_0035-2764_1978_num_29_3_408396. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Equipe PERSEE (email available below). General contact details of provider: https://www.persee.fr/collection/reco .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.