A Competitive Equilibrium With Product Differentiation
This note gives a method of determining the long-run equilibrium output of a firm operating under imperfect competition that differs from standard methods of output determination and reveals properties of the equilibrium that standard methods conceal. This method requires a basic cost-effectiveness condition to hold, which leads to a highly elastic demand. If we strengthen that condition a bit, long-run equilibrium under free entry and exit becomes indistinguishable from a long-run equilibrium under perfect competition, even though products are differentiated and the condition given by Rosen for perfect competition with product differentiation fails to hold.
|Date of creation:||29 Nov 2004|
|Date of revision:||13 Jul 2017|
|Publication status:||Published: Carleton Economic Papers|
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- Rosen, Sherwin, 1974. "Hedonic Prices and Implicit Markets: Product Differentiation in Pure Competition," Journal of Political Economy, University of Chicago Press, vol. 82(1), pages 34-55, Jan.-Feb..
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