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Market Definition in Two-Sided Markets: Theory and Practice

Author

Listed:
  • Lapo Filistrucchi

    (DISEI, Università degli studi di Firenze)

  • Damien Geradin
  • Eric van Damme
  • Pauline Affeldt

Abstract

Drawing from the economics of two-sided markets, we provide suggestions for the definition of the relevant market in cases involving two-sided platforms, such as media outlets, online intermediaries, payment cards companies and auction houses. We also discuss when a one-sided approach may be harmless and when instead it can potentially lead to a wrong decision. We then show that the current practice of market definition in two-sided markets is only in part consistent with the above suggestions. Divergence between our suggestions and practice is due to the failure to fully incorporate the lessons from the economic theory of two-sided markets, to the desire to be consistent with previous practice and to the higher data requirements and the higher complexity of empirical analysis in cases involving two-sided platforms. In particular, competition authorities have failed to recognize the crucial difference between two-sided transaction and non-transaction markets and have been misled by the traditional argument that where there is no price, there is no market.

Suggested Citation

  • Lapo Filistrucchi & Damien Geradin & Eric van Damme & Pauline Affeldt, 2013. "Market Definition in Two-Sided Markets: Theory and Practice," Working Papers - Economics wp2013_05.rdf, Universita' degli Studi di Firenze, Dipartimento di Scienze per l'Economia e l'Impresa.
    • Handle: RePEc:frz:wpaper:wp2013_05.rdf
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    References listed on IDEAS

    as
    1. Jean-Charles Rochet & Jean Tirole, 2002. "Cooperation Among Competitors: Some Economics Of Payment Card Associations," RAND Journal of Economics, The RAND Corporation, vol. 33(4), pages 549-570, Winter.
    2. Elena Argentesi & Lapo Filistrucchi, 2007. "Estimating market power in a two-sided market: The case of newspapers," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 22(7), pages 1247-1266.
    Full references (including those not matched with items on IDEAS)

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    More about this item

    Keywords

    two-sided markets; two-sided platforms; market definition; SSNIP test; Hypothetical Monopolist test;
    All these keywords.

    JEL classification:

    • L40 - Industrial Organization - - Antitrust Issues and Policies - - - General
    • L50 - Industrial Organization - - Regulation and Industrial Policy - - - General
    • K21 - Law and Economics - - Regulation and Business Law - - - Antitrust Law

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