Book excerpt: Despite the introduction of the U.S. - EC merger review co-operation initiative in the early nineties, transatlantic mergers remain a minefield for all those involved. For the parties there is the lack of legal certainty and its attendant costs and reputation; for the regulators there is the political toll of reconciling conflicting competition policies. Charles Smitherman reviews merger regulation frameworks on both sides of the Atlantic. The author identifies areas of substantive and procedural differences as they exist today and explores the viability of convergence to aid the efficiency of the merger process through bilateral and domestic enhancements. Throughout the work the emphasis is placed on pragmatic solutions rather than those of academic and oft-unobtainable nature. The backbone of the work is made up of the analysis of eight of the biggest U.S. - EC merger cases between 2000 and 2004.