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Two-Sided Market Definition

ABA Section of Antitrust Law, MARKET DEFINITION IN ANTITRUST: THEORY AND CASE STUDIES, Forthcoming

35 Pages Posted: 29 Apr 2009 Last revised: 13 Nov 2009

David S. Evans

Global Economics Group; University College London

Date Written: November 11, 2009

Abstract

This paper addresses the analysis of market definition when the parties involved in an antitrust or merger analysis include one or more two-sided platforms. We discuss how standard market definition measures such as SSNIP tests, diversion ratios, and conditional logit demand analyses have to be modified to account for the unique characteristics of two-sided platforms. We also review how market definition of two- sided platforms was treated in recent US and EC case law.

Keywords: multi-sided platforms, two-sided platforms, two-sided markets, market definition, antitrust analysis, merger analysis

JEL Classification: K21, L1, L4

Suggested Citation

Evans, David S., Two-Sided Market Definition (November 11, 2009). ABA Section of Antitrust Law, MARKET DEFINITION IN ANTITRUST: THEORY AND CASE STUDIES, Forthcoming. Available at SSRN: https://ssrn.com/abstract=1396751

David S. Evans (Contact Author)

Global Economics Group ( email )

111 Devonshire St.
Suite 900
Boston, MA 02108
United States

University College London ( email )

Gower St
London WC1E OEG, WC1E 6BT
United Kingdom

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