IDEAS home Printed from
   My bibliography  Save this article

Collusion and seasonality of market price - A case of fixed market shares


  • Sylwester Bejger

    () (Faculty of Economics and Management Nicholas Copernicus University of Torun, Poland.)


The paper develops a simple supergame model of collusion that focuses on the role of fixed (exogenous to game played) system of quantity market shares. Conclusions implied by the model could be used to motivate data - saving markers of collusion based on market price behavior. Following conclusions of the theoretical model we propose marker of collusion based on detecting changes in seasonal parameters of prices in periods of possible collusion. An empirical application of method has been done on well known data of Lysine cartel case.

Suggested Citation

  • Sylwester Bejger, 2010. "Collusion and seasonality of market price - A case of fixed market shares," Business and Economic Horizons (BEH), Prague Development Center, vol. 2(2), pages 48-59, July.
  • Handle: RePEc:pdc:jrnbeh:v:2:y:2010:i:2:p:48-59

    Download full text from publisher

    File URL:
    Download Restriction: no

    File URL:
    Download Restriction: no

    References listed on IDEAS

    1. de Roos, Nicolas, 2004. "A model of collusion timing," International Journal of Industrial Organization, Elsevier, vol. 22(3), pages 351-387, March.
    2. Lars-Hendrik Röller & Frode Steen, 2006. "On the Workings of a Cartel: Evidence from the Norwegian Cement Industry," American Economic Review, American Economic Association, vol. 96(1), pages 321-338, March.
    Full references (including those not matched with items on IDEAS)

    More about this item


    Collusion; repeated games; fixed market shares; seasonality of market price.;

    JEL classification:

    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • L41 - Industrial Organization - - Antitrust Issues and Policies - - - Monopolization; Horizontal Anticompetitive Practices


    Access and download statistics


    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:pdc:jrnbeh:v:2:y:2010:i:2:p:48-59. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Jaroslav Holecek) or (Rebekah McClure). General contact details of provider: .

    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 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.

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

    IDEAS is a RePEc service hosted by the Research Division of the Federal Reserve Bank of St. Louis . RePEc uses bibliographic data supplied by the respective publishers.