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Trade and Variety in a Model of Endogenous Product Differentiation

  • Oliver Lorz


    (RWTH Aachen University)

  • Matthias Wrede


    (Philipps-University Marburg)

This paper sets up a model of endogenous product differentiation to analyze the variety effects of international trade. In our model multi-product firms decide not only about the number of varieties they supply but also about the degree of horizontal differentiation between these varieties. Firms can raise the degree of differentiation by investing variety-specific fixed costs. In this setting, we analyze how trade integration, i.e. an increase in market size, influences the number of firms in the market, the number of product varieties supplied by each firm, and the degree of differentiation.

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Paper provided by Philipps-Universität Marburg, Faculty of Business Administration and Economics, Department of Economics (Volkswirtschaftliche Abteilung) in its series MAGKS Papers on Economics with number 200902.

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Length: 13 pages
Date of creation: 2009
Date of revision:
Publication status: Forthcoming in
Handle: RePEc:mar:magkse:200902
Contact details of provider: Postal: Universitätsstraße 25, 35037 Marburg
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  1. Carsten Eckel, 2006. "Trade and Diversity: Is There a Case for 'Cultural Protectionism?'," German Economic Review, Verein für Socialpolitik, vol. 7, pages 403-418, November.
  2. Marc J. Melitz & Gianmarco I.P. Ottaviano, 2005. "Market Size, Trade, and Productivity," NBER Working Papers 11393, National Bureau of Economic Research, Inc.
  3. Peter Neary & Carsten Eckel, 2006. "Multi-Product Firms and Flexible Manufacturing in the Global Economy," Economics Series Working Papers 292, University of Oxford, Department of Economics.
  4. Andrew B. Bernard & Stephen Redding & Peter K. Schott, 2006. "Multi-product firms and trade liberalization," LSE Research Online Documents on Economics 3684, London School of Economics and Political Science, LSE Library.
  5. Brambilla, Irene, 2009. "Multinationals, technology, and the introduction of varieties of goods," Journal of International Economics, Elsevier, vol. 79(1), pages 89-101, September.
  6. 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.
  7. 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.
  8. Simon P. Anderson & André de Palma, 2003. "Market Performance With Multiproduct Firms," Virginia Economics Online Papers 357, University of Virginia, Department of Economics.
  9. Volker Nocke & Stephen Yeaple, 2006. "Globalization and Endogenous Firm Scope," NBER Working Papers 12322, National Bureau of Economic Research, Inc.
  10. repec:adr:anecst:y:1997:i:47:p:07 is not listed on IDEAS
  11. Eckel, Carsten, 2009. "Endogenous sunk costs, flexible manufacturing and the productivity effects of international trade," Munich Reprints in Economics 20532, University of Munich, Department of Economics.
  12. John Baldwin & Wulong Gu, 2009. "The Impact of Trade on Plant Scale, Production-Run Length and Diversification," NBER Chapters, in: Producer Dynamics: New Evidence from Micro Data, pages 557-592 National Bureau of Economic Research, Inc.
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