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Competition in two-sided markets with common network externalities

Author

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  • Bardey, David
  • Cremer, Helmuth
  • Lozachmeur, Jean-Marie

Abstract

We study competition in two sided markets with common network externality rather than with the standard inter-group effects. This type of externality occurs when both groups benefit, possibly with different intensities, from an increase in the size of one group and from a decrease in the size of the other. We explain why common externality is relevant for the health and education sectors. We focus on the symmetric equilibrium and show that when the externality itself satisfies an homogeneity condition then platforms’ profits and price structure have some specific properties. Our results reveal how the rents coming from network externalities are shifted by platforms from one side to other, according to the homogeneity degree. In the specific but realistic case where the common network externality is homogeneous of degree zero, platform's profit do not depend on the intensity of the (common) network externality. This is in sharp contrast to conventional results stating that the presence of network externalities in a two-sided market structure increases the intensity of competition when the externality is positive (and decreases it when the externality is negative). Prices are affected but in such a way that platforms only transfer rents from consumers to providers.

Suggested Citation

  • Bardey, David & Cremer, Helmuth & Lozachmeur, Jean-Marie, 2009. "Competition in two-sided markets with common network externalities," TSE Working Papers 09-103, Toulouse School of Economics (TSE), revised Oct 2010.
  • Handle: RePEc:tse:wpaper:21963
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    References listed on IDEAS

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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. Mark Armstrong, 2006. "Competition in two‐sided markets," RAND Journal of Economics, RAND Corporation, vol. 37(3), pages 668-691, September.
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    Cited by:

    1. Belleflamme, Paul & Toulemonde, Eric, 2016. "Who benefits from increased competition among sellers on B2C platforms?," Research in Economics, Elsevier, vol. 70(4), pages 741-751.
    2. repec:kap:jeczfn:v:120:y:2017:i:3:d:10.1007_s00712-016-0507-3 is not listed on IDEAS
    3. Annika Herr, 2011. "Quality and Welfare in a Mixed Duopoly with Regulated Prices: The Case of a Public and a Private Hospital," German Economic Review, Verein für Socialpolitik, vol. 12(4), pages 422-437, November.

    More about this item

    JEL classification:

    • D42 - Microeconomics - - Market Structure, Pricing, and Design - - - Monopoly
    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms
    • L12 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Monopoly; Monopolization Strategies

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