Monopolization, in the United States, and abuse of dominance, in the European Union, embody different philosophies about how best to police single firm conduct in competition law. Surprisingly, their disagreement ends at market definition. Both doctrines define relevant markets by similar...

Merging firms regularly argue that mergers involving capacity-constrained firms are unlikelyto be anticompetitive, because a capacity-constrained firm does not represent a meaningful competitive constraint on its rivals. We construct a modified notion of upward pricing pressure called ccGUPPI,...

Common ownership fundamentally upsets the well-settled merger enforcement ecosystem. Not only it challenges basic principles informing merger policy such as the presumed profitability of mergers for the merging firms and the merger-specificity of potential efficiencies but also it works against...

Surging interest in antitrust enforcement is exposing, once again, the difficulty of defining relevant markets. Past decades have witnessed the invention of many tests for defining markets, but little progress has been made, or even attempted, at reconciling these different tests. Modern market...

Should internet era merger policy differ from industrial era merger policy? Platform ecosystems rely on economies of scale, data-driven economies of scope, high-quality algorithmic systems, and strong network effects that frequently promote winner-take-most markets. Their market dominance has...

The Global Antitrust Institute (“GAI”) respectfully submits this Comment to the U.S. Department of Justice (“DOJ”) and the Federal Trade Commission (“FTC”) in connection with their Request for Information on Merger Enforcement (“Merger RFI”). This comment addresses the questions...

The Global Antitrust Institute (“GAI”) respectfully submits this Comment to the U.S. Department of Justice (“DOJ”) and the Federal Trade Commission (“FTC”) in connection with their Request for Information on Merger Enforcement (“Merger RFI”). The GAI welcomes the opportunity to...

The Global Antitrust Institute (“GAI”) respectfully submits this Comment to the U.S. Department of Justice (“DOJ”) and the Federal Trade Commission (“FTC”) in response to their Request for Information on Merger Enforcement. This Comment addresses the questions related to Purpose,...

The Global Antitrust Institute (“GAI”) respectfully submits this Comment to the U.S. Department of Justice (“DOJ”) and the Federal Trade Commission (“FTC”) in connection with their Request for Information on Merger Enforcement (“Merger RFI”) This comment addresses the questions...

This Comment focuses on Section 7: Potential and Nascent Competition of the Department of Justice and Federal Trade Commission's January 18, 2022, Request for Information on Merger Enforcement. Despite information and uncertainty problems with assessing potential and nascent competition, the...