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Faculty of Economics

Journal Cover

Elliott, M., and Galeotti, A.

The Role of Networks in Antitrust Investigations

Oxford Review of Economic Policy

Vol. 35(4) pp. 614–637 (2019)

Abstract: 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.

Keywords: antitrust, competition, networks, networked market

JEL Codes: L13, L14, L40

Author links: Matthew Elliott  

Publisher's Link: https://doi.org/10.1093/oxrep/grz022



Papers and Publications



Recent Publications


Elliott, M. and Golub, B. A Network Approach to Public Goods Journal of Political Economy [2019]

Galeotti, A., Golub, B. and Goyal, S. Targeting Interventions in Networks Econometrica [2020]

Aidt, T. S., Asatryan, Z., Badalyan, L. and Heinemann, F. Vote Buying or (Political) Business (Cycles) as Usual? Review of Economics and Statistics [2020]

Giannitsarou, C., Kissler, S. and Toxvaerd, F. Waning Immunity and the Second Wave: Some Projections for SARS-CoV-2 American Economic Review: Insights, forthcoming [2021]