Does Entry Improve Welfare ? A General Equilibrium Approach of Competition Policy
AbstractWe consider a general equilibrium model under imperfect competition. Firms have constantreturns, they are price taker in the input market and compete à la Cournot in theproduct market. We assume a representative consumer exists. We show that an increase inthe number of firms of a given market does not always improve welfare, challenging thecommon idea according to which mergers with no cost synergy are not desirable for theconsumer.
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Bibliographic InfoPaper provided by Centre de Recherche en Economie et Statistique in its series Working Papers with number 2005-08.
Date of creation: 2005
Date of revision:
Other versions of this item:
- Bertrand Crettez & Marie-Cécile Fagart, 2009. "Does entry improve welfare? A general equilibrium approach to competition policy," Journal of Economics, Springer, vol. 98(2), pages 97-118, November.
- Bertrand Crettez & Marie-Cécile Fagart, 2008. "Does entry improve welfare? A general equilibrium approach to competition policy," EconomiX Working Papers 2008-14, University of Paris West - Nanterre la Défense, EconomiX.
- D50 - Microeconomics - - General Equilibrium and Disequilibrium - - - General
- L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
- L40 - Industrial Organization - - Antitrust Issues and Policies - - - General
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