William Blumenthal and Marc Raven authored the U.S. chapter, and Steve Spinks and Ken Daly authored the EU chapter, of the 13th edition of The International Comparative Legal Guide to: Merger Control. The guide provides corporate counsel and international practitioners with comprehensive legal analysis of the merger control laws and regulations in 50 jurisdictions. This article appeared in the 2017 edition of The International Comparative Legal Guide to: Merger Control, published by Global Legal Group Ltd, London.