Abstract: Since the seminal paper of Rochet and the Nobel Prize laureate Tirole in 2003, the theory of multisided markets has garnered considerable academic attention. The practical application of the theory remains, however, challenging. This article seeks to bring together the key features of multisided market economics and identify the key principles, which can affect practical enforcement. Following a consideration of the economic and legal challenges involved in the analysis of multisided platforms, the article reviews two case studies—the European Court of Justice's recent MasterCard decision concerning multilateral interchange fees and the Dutch Competition Authority's review of the European Directories—Truvo Nederland merger—and showcases the associated enforcement challenges. The complete article published in Journal of Antitrust Enforcement, doi: 10.1093/jaenfo/jnw007, June 30, 2016: http://antitrust.oxfordjournals.org/cgi/content/full/jnw007?ijkey=fFY4rtH7iJieTZv&keytype=ref

The content of this article is intended to provide a general guide to the subject matter. Specialist advice should be sought about your specific circumstances.