Continuity and Change in the 2010 Merger Guidelines

For almost 30 years, the U.S. antitrust enforcement agencies have described a structured, step-by-step analytical methodology in their Merger Guidelines. Prior revisions to the Guidelines were designed, in significant part, to clarify actual practice at the agencies in light of historical experience, while keeping the underlying methodology intact. The 2010 Merger Guidelines are supportive of this tradition; the document clarifies actual practice in ce