Dominant or apparently dominant internet platform increasingly become subject to both antitrust investigations and further-reaching political calls for regulation. While Google is currently in the focus of the discussion, the next candidate is already on the horizon - the ubiquitous online...

Digital platforms are at the heart of online economic activity, connecting multi-sided markets of producers and consumers of various goods and services. Their market power, in combination with their privileged ecosystem position, raises concerns that they may engage in anti-competitive practices...

The House Judiciary Antitrust Subcommittee asked me to submit suggestions concerning the adequacy of existing antitrust laws, enforcement policies, and enforcement levels insofar as they impact the state of competition in the digital marketplace. My submission recommends the following nine...

In the course of its investigation of digital platforms the House Judiciary Antitrust Subcommittee invited submissions on 1) the adequacy of existing laws that prohibit monopolization and monopolistic conduct; 2) the adequacy of existing laws that prohibit anticompetitive transactions; and 3)...

Should the FTC have allowed Zillow to acquire its foremost rival, Trulia? It is increasingly well-accepted that digital platforms tend toward dominance in their immediately adjacent relevant-product markets. Google, for example, has long held a majority share of the markets for general-search...

Antitrust issues in the digital economy, especially those concerning big data and algorithms, have attracted the attention of both scholars and practitioners all around the world. Against the backdrop of rapid development of China's digital economy, many online platforms now have a largely data-...

Platforms, or two-sided markets, have become a topic of significant discussion in competition law over the past decade, culminating in the recent US Supreme Court decision in Ohio v. American Express Co. This note discusses externalities in platforms. Indirect network effects, one type of...

This essay provides a perspective on the role of antitrust law in protecting and fostering competition in the digital economy, with particular attention to online platforms. It highlights the danger of anti-competitive exclusionary conduct by dominant online platforms and describes ways that...

This is a paper about “big data” and antitrust law. For my purposes, big data refers to digital platforms that enable the discovery and sharing of information by consumers, and the harvesting and analysis of data on those consumers by the platform. The obvious example of such a platform is...