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Cartel Formation with Quality Differentiation

Iwan Bos, Marco Marini and Riccardo Saulle ()

No 14/19, Working Papers from Sapienza University of Rome, DISS

Abstract: Research on collusion in vertically differentiated markets is conducted under one or two potentially restrictive assumptions. Either there is a single industry-wide cartel or costs are assumed to be independent of quality or quantity. We explore the extent to which these assumptions are indeed restrictive by relaxing both. For a wide range of coalition structures, profit-maximizing cartels of any size price most of their lower quality products out of the market as long as production costs do not increase too much with quality. If these costs rise sufficiently, however, then market share is maintained for all product variants. All cartel sizes may emerge in equilibrium when exclusively considering individual deviations, but the industry-wide cartel is the only one immune to deviations by coalitions of members. Overall, our findings suggest that firms have a strong incentive to coordinate prices when the products involved are vertically differentiated.

Keywords: Cartel Formation; Collusion; Vertical Differentiation; Endogenous Coalition Formation; Industry-wide Cartel; Partial Cartels. (search for similar items in EconPapers)
JEL-codes: D42 D43 L1 L12 L13 L41 (search for similar items in EconPapers)
Date: 2019-12
New Economics Papers: this item is included in nep-cdm, nep-com, nep-gth and nep-ind
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Journal Article: Cartel formation with quality differentiation (2020) Downloads
Working Paper: Cartel Formation with Quality Differentiation (2019) Downloads
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