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Multi-product Firms and Product Variety

AuthorsCaminal, Ramón ; Granero, Luis M.
KeywordsProduct variety
Multiproduct firms
Issue Date10-Mar-2008
SeriesUFAE and IAE Working Papers
AbstractThe 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.
DescriptionA preliminary version of this paper was circulated under the title "Too many or too few varieties: the role of multi-product firms" (CEPR Discussion Papers; 5938, Nov. 2006).-- Trabajo publicado como artículo en Economica 79(314): 303-328 (2012).-- http://dx.doi.org/10.1111/j.1468-0335.2011.00897.x
Publisher version (URL)http://dx.doi.org/10.1111/j.1468-0335.2011.00897.x
Appears in Collections:(IAE) Informes y documentos de trabajo
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