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.
References listed on IDEAS Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
Gianmarco Ottaviano & Takatoshi Tabuchi & Jacques-FranÁois Thisse, 2002.
"Agglomeration and Trade Revisited,"
International Economic Review,
Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 43(2), pages 409-436, May.
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OTTAVIANO, Gianmarco & TABUCHI, Takatoshi & THISSE, Jacques-Franois, 1999.
"Agglomeration and trade revisited,"
CORE Discussion Papers
1999041, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
[Downloadable!]
Gianmarco Ottaviano & Takatoshi Tabuchi & Jacques-Francois Tissse, 1999.
"Agglomeration and Trade Revisited,"
CIRJE F-Series
CIRJE-F-65, CIRJE, Faculty of Economics, University of Tokyo.
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