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- W2517576890 abstract "Vertical mergers within a multi-echelon market result in equilibrium price changes, for wholesalers and retailers, alike. They may also impact the product variety that is available to the consumer, i.e., the equilibrium product assortment sold in the market. In this paper, we consider the simultaneous price and variety effects of vertical mergers in a general two-echelon base model, in which an arbitrary number of firms compete at each echelon; each of the upstream suppliers offers one or multiple products to some or all of the retailers or directly to the end consumer. We assume linear price or two-part tariff contracts, with prices selected sequentially, in a sequence of oligopolistic price competitions: the process starts with the firms at the upper echelon, followed by simultaneous price selections by the retailers in the downstream echelon. To assess the impact on product variety, we employ a demand model with the characteristic that, depending on the selected retail prices, a smaller or larger subset of all potential products is sold in the market. For an arbitrary merger of a supplier with a group of retailers, we characterize the post-merger equilibrium behavior and show how the changes of all performance measures of interest, i.e., wholesale and retail price equilibria, product assortment, sales volumes, the firms' profit levels and consumer welfare, can be computed efficiently. When the merger is strictly vertical, i.e., involves a single retailer (organization) with whom the supplier deals on an exclusive basis, we prove that the merger results in a (weak) reduction of all equilibrium prices, along with a (weak) shrinkage of the product assortment." @default.
- W2517576890 created "2016-09-16" @default.
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- W2517576890 date "2016-01-01" @default.
- W2517576890 modified "2023-09-23" @default.
- W2517576890 title "The Price and Variety Effects of Vertical Mergers" @default.
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- W2517576890 doi "https://doi.org/10.2139/ssrn.2830156" @default.
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