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Can partial horizontal ownership lessen competition more than a monopoly?

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In this paper we investigate the anti-competitive effects of partial horizontal ownership in a setting where: (i) two cost-asymmetric firms compete a la Cournot; (ii) managers deal with eventual conflicting interests of the different shareholders by maximizing a weighted sum of the two firms' operating profits; and (iii) weights result from the corporate control structure of the firm they run. Within this theoretical structure, we find that if the manager of the more efficient firm weights the operating profit of the (inefficient) rival more than its own profit, then partial ownership will lessen competition more than a monopoly when both firms produce. (C) 2019 Elsevier B.V. All rights reserved.

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Partial horizontal ownership Common-ownership Cross-ownership Monopoly Duopoly Cost asymmetries

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Brito, D., Ribeiro, R., & Vasconcelos, H. (2019). Can partial horizontal ownership lessen competition more than a monopoly? Economics Letters, 176, 90–95. https://doi.org/10.1016/j.econlet.2018.12.039

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