The role of networks in antitrust investigations

Elliott, M and Galeotti, A (2019) The role of networks in antitrust investigations. Oxford Review of Economic Policy, 35 (4). pp. 614-637. ISSN 0266-903X OPEN ACCESS


Antitrust investigations typically focus on the competitive pressures coming from within the defined markets of interest. However, competitive pressures can also come from other markets. Even when individually these markets place only weak constraints on one another, collectively they may matter. A networks approach to modelling competition permits a systemic view of competition that can sometimes paint a more accurate picture. We demonstrate this through some simple examples, and show more generally how tools from the networks literature can be applied to capture competition across a system of interrelated markets. As a leading example, we consider antitrust investigations into supermarkets where local geographic markets have been used as the basis of investigation.

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Item Type: Article
Subject Areas: Economics
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© 2019 Oxford University Press and Oxford Review of Economic Policy Limited

Funder Name: European Research Council, European Research Council
Date Deposited: 16 Dec 2019 15:34
Date of first compliant deposit: 20 Dec 2019
Subjects: Monopoly
Last Modified: 16 Mar 2024 01:45

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