Antitrust & Competition Policy Blog

Editor: D. Daniel Sokol
University of Florida
Levin College of Law

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Friday, December 30, 2011

Product Differentiation, the Volume of Trade and Profits under Cournot and Bertrand Duopoly

Posted by D. Daniel Sokol

David R. Collie, (Cardiff Business School) and Vo Phuong Mai Le (Cardiff Business School) analyze Product Differentiation, the Volume of Trade and Profits under Cournot and Bertrand Duopoly.

ABSTRACT: This paper analyses how product differentiation affects the volume of trade under duopoly using Shubik-Levitan demand functions rather than the Bowley demand functions used by Bernhofen (2001). The Shubik-Levitan demand functions have the advantage that an increase in product differentiation does not increase the size of the market as happens with the Bowley demand functions. It is shown that the volume of trade in terms of quantities is decreasing in the degree of product differentiation when the trade cost is relatively low, but increasing in the degree of product differentiation when the trade cost is relatively high.

http://lawprofessors.typepad.com/antitrustprof_blog/2011/12/product-differentiation-the-volume-of-trade-and-profits-under-cournot-and-bertrand-duopoly-.html

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