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Multi-product Firms and Product Variety

The goal of this paper is to study the role of multi-product firms in the market provision of product variety. The analysis is conducted using the spokes model of non-localized competition proposed by Chen and Riordan (2007). Firstly, we show that multi-product firms are at a competitive disadvantage vis-a-vis single-product firms and can only emerge if economies of scope are sufficiently strong. Secondly, under duopoly product variety may be higher or lower with respect to both the first best and the monopolistically competitive equilibrium. However, within a relevant range of parameter values duopolists drastically restrict their product range in order to relax price competition, and as a result product variety is far below the efficient level.

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Paper provided by Unitat de Fonaments de l'Anàlisi Econòmica (UAB) and Institut d'Anàlisi Econòmica (CSIC) in its series UFAE and IAE Working Papers with number 734.08.

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Length: 39
Date of creation: 10 Mar 2008
Date of revision:
Handle: RePEc:aub:autbar:734.08
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  1. Eckel, Carsten & Neary, J Peter, 2006. "Multi-Product Firms and Flexible Manufacturing in the Global Economy," CEPR Discussion Papers 5941, C.E.P.R. Discussion Papers.
  2. Besanko, David & Perry, Martin K & Spady, Richard H, 1990. "The Logit Model of Monopolistic Competition: Brand Diversity," Journal of Industrial Economics, Wiley Blackwell, vol. 38(4), pages 397-415, June.
  3. Richard Schmalensee, 1978. "Entry Deterrence in the Ready-to-Eat Breakfast Cereal Industry," Bell Journal of Economics, The RAND Corporation, vol. 9(2), pages 305-327, Autumn.
  4. repec:bla:restud:v:77:y:2010:i:1:p:188-217 is not listed on IDEAS
  5. Dixit, Avinash K & Stiglitz, Joseph E, 1977. "Monopolistic Competition and Optimum Product Diversity," American Economic Review, American Economic Association, vol. 67(3), pages 297-308, June.
  6. Minniti Antonio, 2006. "Multi-product Firms, R&D, and Growth," The B.E. Journal of Macroeconomics, De Gruyter, vol. 6(3), pages 1-46, December.
  7. Ottaviano, Gianmarco & Thisse, Jacques-François, 1998. "Agglomeration and Trade Revisited," CEPR Discussion Papers 1903, C.E.P.R. Discussion Papers.
  8. Jiandong Ju, 2003. "Oligopolistic Competition, Technology Innovation, and Multiproduct Firms," Review of International Economics, Wiley Blackwell, vol. 11(2), pages 346-359, 05.
  9. Paul Allanson & Catia Montagna, 1999. "Multiproduct Firms and Market Structure: An Explorative Application to the Product Life Cycle," Dundee Discussion Papers in Economics 101, Economic Studies, University of Dundee.
  10. Yongmin Chen & Michael H. Riordan, 2007. "Price and Variety in the Spokes Model," Economic Journal, Royal Economic Society, vol. 117(522), pages 897-921, 07.
  11. Volker Nocke & Stephen Yeaple, 2006. "Globalization and Endogenous Firm Scope," NBER Working Papers 12322, National Bureau of Economic Research, Inc.
  12. Bonanno, Giacomo, 1987. "Location Choice, Product Proliferation and Entry Deterrence," Review of Economic Studies, Wiley Blackwell, vol. 54(1), pages 37-45, January.
  13. Simon P. Anderson & André de Palma, 2003. "Market Performance With Multiproduct Firms," Virginia Economics Online Papers 357, University of Virginia, Department of Economics.
  14. Spence, Michael, 1976. "Product Selection, Fixed Costs, and Monopolistic Competition," Review of Economic Studies, Wiley Blackwell, vol. 43(2), pages 217-35, June.
  15. James Brander & Jonathan Eaton, 1982. "Product Line Rivalry," Working Papers 519, Queen's University, Department of Economics.
  16. Steven C. Salop, 1979. "Monopolistic Competition with Outside Goods," Bell Journal of Economics, The RAND Corporation, vol. 10(1), pages 141-156, Spring.
  17. Simon P. Anderson & Andr� Palma, 2006. "MARKET PERFORMANCE WITH MULTIPRODUCT FIRMS -super-* ," Journal of Industrial Economics, Wiley Blackwell, vol. 54(1), pages 95-124, 03.
  18. Robert Feenstra & Hong Ma, 2007. "Optimal Choice of Product Scope for Multiproduct Firms under Monopolistic Competition," NBER Working Papers 13703, National Bureau of Economic Research, Inc.
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