IDEAS home Printed from https://ideas.repec.org/a/oup/jcomle/v4y2008i2p263-270..html
   My bibliography  Save this article

The Ssnip Test And Market Definition With The Aggregate Diversion Ratio: A Reply To Katz And Shapiro

Author

Listed:
  • Øystein Daljord
  • Lars Sørgard
  • Øyvind Thomassen

Abstract

The Hypothetical Monopolist or Small but Significant Non-transitory Increase in Prices (SSNIP) test defines the relevant market by determining whether a given increase in product prices would be profitable for a monopolist in the candidate market. The U.S. Merger Guidelines do not specify whether the SSNIP test should be performed with an increase in one price, some prices, or all prices in the candidate market. We argue that this should depend on characteristics of the market: if there are asymmetries between products, increasing only one price might be the best way to identify competitive constraints. Katz and Shapiro derive a one-price test criterion of critical loss in terms of the aggregate diversion ratio. Unfortunately, the derivation is incorrect. We show what the correct criterion should be.

Suggested Citation

  • Øystein Daljord & Lars Sørgard & Øyvind Thomassen, 2008. "The Ssnip Test And Market Definition With The Aggregate Diversion Ratio: A Reply To Katz And Shapiro," Journal of Competition Law and Economics, Oxford University Press, vol. 4(2), pages 263-270.
    • Handle: RePEc:oup:jcomle:v:4:y:2008:i:2:p:263-270.
    as

    Download full text from publisher

    File URL: http://hdl.handle.net/10.1093/joclec/nhm032
    Download Restriction: Access to full text is restricted to subscribers.
    ---><---

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

    Citations

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


    Cited by:

    1. Sergio Aquino de Souza & Eduardo Pontual Ribeiro & Gerson Carvalho, 2010. "Documento de Trabalho 01/2010 - Delimitação de Mercado Relevante," Documentos de Trabalho 2010010, Conselho Administrativo de Defesa Econômica (Cade), Departamento de Estudos Econômicos.
    2. Sergio Aquino de Souza & Eduardo Pontual Ribeiro & Gerson Carvalho, 2010. "Documento de Trabalho 01/2010 - Delimitação de Mercado Relevante," Documentos de Trabalho 12010, Conselho Administrativo de Defesa Econômica (Cade), Departamento de Estudos Econômicos.
    3. Daljord, Øystein & Sørgard, Lars, 2011. "Single-product versus uniform SSNIPs," International Review of Law and Economics, Elsevier, vol. 31(2), pages 142-146, June.
    4. Øystein Daljord, 2009. "An Exact Arithmetic Ssnip Test For Asymmetric Products," Journal of Competition Law and Economics, Oxford University Press, vol. 5(3), pages 563-569.
    5. Haucap, Justus & Heimeshoff, Ulrich & Klein, Gordon J. & Rickert, Dennis & Wey, Christian, 2021. "Vertical relations, pass-through, and market definition: Evidence from grocery retailing," International Journal of Industrial Organization, Elsevier, vol. 74(C).

    More about this item

    JEL classification:

    • K21 - Law and Economics - - Regulation and Business Law - - - Antitrust Law
    • L1 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance
    • 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

    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:oup:jcomle:v:4:y:2008:i:2:p:263-270.. 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.

    We have no bibliographic references for this item. You can help adding them by using 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: Oxford University Press (email available below). General contact details of provider: https://academic.oup.com/jcle .

    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.