A merger that leads to only a small increase in a dominant company’s market share may still cause “dynamic harm,” the European Commission’s chief competition economist said, pointing to a ruling that upheld a ... (more story)

The US Justice Department’s Antitrust Division considers its merger guidelines “very instructive but not dispositive” in enforcement decisions, a senior division official said, while signaling that the agency ... (more story)

Australia’s competition watchdog has challenged Coles Supermarkets Australia’s “narrow” approach to assessing whether its Kalgoorlie lease acquisition would substantially lessen competition under the 2010 Comp... (more story)

The US federal government has become an "unreliable enforcer" of antitrust law as the White House now directs the Department of Justice and Federal Trade Commission, and law enforcement is subject to political... (more story)

Though US states were disappointed after the Hewlett Packard Enterprise-Juniper Networks merger antitrust settlement was upheld by a federal district court, resource constraints prevented them from either fili... (more story)

A breakdown in the relationship between the two federal antitrust enforcement agencies and their state counterparts has meant the loss of valuable resources such as competition economists, and it is a "top of ... (more story)

A phased second-request process is intended to strengthen transparency and accountability in the US Justice Department’s Antitrust Division while ensuring that enforcement staff and senior leadership are worki... (more story)

US antitrust enforcers are confronting the limits of cooperative federalism in merger control, as state challenges to transactions increasingly risk colliding with federal enforcement decisions, a senior Justi... (more story)