Unrestricted Duopoly Competition: Equilibrium and Survival
This paper is inspired by the ever lasting discussions over Bertrand's (1883) price-deviation critique of Cournot's (1838) duopoly analysis. We consider a homogenous good duopoly with constant marginal costs and no capacity constraints, but we allow firms to set either a quantity, a price, or both. We derive two main results. First, this model has two duopoly equilibria, one where firms commit only to prices (Bertrand behavior) and one where they commit only to quantities (Cournot behavior), and it has equilibria supporting a perfect contestable market where one firm supplies the entire market at a price equal to marginal costs. Second, the Cournot behavior is best fit for survival in terms of evolutionary stability. This provides an argument for the existence of quantity-commitment institutions like auctions in oligopolistic markets for homogenous goods.
|Date of creation:||Jun 2002|
|Contact details of provider:|| Postal: Øster Farimagsgade 5, Building 26, DK-1353 Copenhagen K., Denmark|
Phone: (0045) 35 32 30 54
Fax: +45 35 32 30 00
Web page: http://www.econ.ku.dk/cie/
More information through EDIRC
When requesting a correction, please mention this item's handle: RePEc:kud:kuieci:2002-01. 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: (Thomas Hoffmann)
If references are entirely missing, you can add them using this form.