On the existence and uniqueness of price equilibrium with multi-store firms

Eric Giraud-Heraud and Abdelhakim Hammoudi ()
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Eric Giraud-Heraud: ALISS - Alimentation et sciences sociales - INRA - Institut National de la Recherche Agronomique
Abdelhakim Hammoudi: ALISS - Alimentation et sciences sociales - INRA - Institut National de la Recherche Agronomique

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Abstract: The paper gives a proof of the existence and the uniqueness of price equilibrium in a multi-product, multi-firm competition framework. It illustrates how the price levels depends on the inter-brand portfolio substitution and on the intra-brand portfolio substitution.

Keywords: BERTRAND NASH EQUILIBRIUM; DIFFERENTIATION HORIZONTALE; FIRMES MULTIPRODUITS; EQUILIBRE EN PRIX (search for similar items in EconPapers)
Date: 2009
Note: View the original document on HAL open archive server: https://hal.inrae.fr/hal-02659530v1
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Published in Economics Bulletin, 2009, 29 (2), pp.873-882

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Persistent link: https://EconPapers.repec.org/RePEc:hal:journl:hal-02659530

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