Différenciation verticale et structure du marché
In this paper, we review the literature on vertical product differentiation in connection with its impact on market structure. Two types of vertical differentiation are identified according to whether consumer unanimity over product ranking is maintained at prices reflecting average cost increments necessary to produce higher qualities. If this is the case, the finiteness property prevents market fragmentation by imposing an upper bound on the number of firms even when the fixed cost approaches zero. This situation yields absolute product differentiation advantages to the high quality producers. We focus on the implications of quality choices on entry barriers and market structure under two different assumptions on the nature of the fixed cost. Research on multiproduct firms is also reviewed. L’objectif de ce travail est de faire un survol des progrès récents sur la structure des marchés où se retrouvent plusieurs qualités du même produit. L’accent est mis sur les cas où les consommateurs demeurent unanimes quant au classement des produits, si ces derniers sont offerts à des prix reflétant les augmentations du coût moyen nécessaires pour l’amélioration de leur qualité. Les considérations stratégiques du choix des qualités sous des hypothèses alternatives, quant à la nature du coût fixe ainsi qu’en présence de firmes à plusieurs produits, sont aussi examinées.
Volume (Year): 71 (1995)
Issue (Month): 1 (mars)
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