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Who benefits from increased competition among sellers on B2C platforms?

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  • Paul BELLEFLAMME
  • Eric TOULEMONDE

Abstract

We introduce within-group external effects in the two-sided singlehoming model of Armstrong (2006). First, we propose a general characterization of the platform access fees at the symmetric equilibrium of the game. Second, we combine this general formulation with a specific modeling of the relationship between buyers and sellers on B2C platforms, so as to analyze how changes in the underlying characteristics of the product market affect the equilibrium of the game. We show that sellers may be better off, and buyers worse off, in markets with more sellers. We also show that sellers and buyers prefer full product differentiation while platforms prefer no differentiation.
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Suggested Citation

  • Paul BELLEFLAMME & Eric TOULEMONDE, 2016. "Who benefits from increased competition among sellers on B2C platforms?," LIDAM Reprints CORE 2811, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
    • Handle: RePEc:cor:louvrp:2811
    Note: In : Research in Economics, 70, 741-751, 2016
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    1. Paul Belleflamme & Eric Toulemonde, 2009. "Negative Intra-Group Externalities In Two-Sided Markets," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 50(1), pages 245-272, February.
    2. David Bardey & Helmuth Cremer & Jean-Marie Lozachmeur, 2014. "Competition in Two-Sided Markets with Common Network Externalities," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 44(4), pages 327-345, June.
    3. Belleflamme, Paul & Omrani, Nessrine & Peitz, Martin, 2015. "The economics of crowdfunding platforms," Information Economics and Policy, Elsevier, vol. 33(C), pages 11-28.
    4. Jean‐Charles Rochet & Jean Tirole, 2006. "Two‐sided markets: a progress report," RAND Journal of Economics, RAND Corporation, vol. 37(3), pages 645-667, September.
    5. Galeotti, Andrea & Moraga-González, José Luis, 2009. "Platform intermediation in a market for differentiated products," European Economic Review, Elsevier, vol. 53(4), pages 417-428, May.
    6. Galeotti, Andrea & Moraga-González, José Luis, 2009. "Platform intermediation in a market for differentiated products," European Economic Review, Elsevier, vol. 53(4), pages 417-428, May.
    7. Paul Belleflamme & Julien Jacqmin, 2016. "An Economic Appraisal of MOOC Platforms: Business Models and Impacts on Higher Education," CESifo Economic Studies, CESifo, vol. 62(1), pages 148-169.
    8. Glenn Ellison & Drew Fudenberg, 2003. "Knife-Edge or Plateau: When Do Market Models Tip?," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 118(4), pages 1249-1278.
    9. Volker Nocke & Martin Peitz & Konrad Stahl, 2007. "Platform Ownership," Journal of the European Economic Association, MIT Press, vol. 5(6), pages 1130-1160, December.
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    11. Stephen Martin, 2009. "Microfoundations for the Linear Demand Product Differentiation Model, with Applications," Purdue University Economics Working Papers 1221, Purdue University, Department of Economics.
    12. Belleflamme, Paul & Peitz, Martin, 2010. "Platform competition and seller investment incentives," European Economic Review, Elsevier, vol. 54(8), pages 1059-1076, November.
    13. Mark Armstrong & Julian Wright, 2007. "Two-sided Markets, Competitive Bottlenecks and Exclusive Contracts," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 32(2), pages 353-380, August.
    14. Jean-Charles Rochet & Jean Tirole, 2003. "Platform Competition in Two-Sided Markets," Journal of the European Economic Association, MIT Press, vol. 1(4), pages 990-1029, June.
    15. E. Glen Weyl, 2010. "A Price Theory of Multi-sided Platforms," American Economic Review, American Economic Association, vol. 100(4), pages 1642-1672, September.
    16. Nirvikar Singh & Xavier Vives, 1984. "Price and Quantity Competition in a Differentiated Duopoly," RAND Journal of Economics, The RAND Corporation, vol. 15(4), pages 546-554, Winter.
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    18. Reisinger, Markus, 2014. "Two-part tariff competition between two-sided platforms," European Economic Review, Elsevier, vol. 68(C), pages 168-180.
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    Cited by:

    1. Paul Belleflamme & Martin Peitz, 2019. "Managing competition on a two‐sided platform," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 28(1), pages 5-22, January.
    2. Etro, Federico, 2021. "Device-funded vs ad-funded platforms," International Journal of Industrial Organization, Elsevier, vol. 75(C).
    3. Badran, Mona Farid, 2018. "Digital Platforms in Developing Countries: "A Case-Study of Jumia Egypt"," 29th European Regional ITS Conference, Trento 2018 184929, International Telecommunications Society (ITS).
    4. Federico Etro, 2023. "Hybrid Marketplaces with Free Entry of Sellers," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 62(2), pages 119-148, March.
    5. Avdasheva, Svetlana (Авдашева, Светлана) & Shastitko, Andrei (Шаститко, Андрей), 2015. "Alleged Infringement: The Time of Announcement Does Matter [Предмет Обвинения: Время Объявления Имеет Значение]," Ekonomicheskaya Politika / Economic Policy, Russian Presidential Academy of National Economy and Public Administration, vol. 1, pages 72-91, February.
    6. Federico Etro, 2021. "Product selection in online marketplaces," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 30(3), pages 614-637, August.
    7. Badran, Mona Farid, 2021. "Digital platforms in Africa: A case-study of Jumia Egypt's digital platform," Telecommunications Policy, Elsevier, vol. 45(3).

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    More about this item

    JEL classification:

    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • L86 - Industrial Organization - - Industry Studies: Services - - - Information and Internet Services; Computer Software

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