Every year, top-level market regulators, academics and legal and economic practitioners contribute to the Annual Competition Workshop organised at the European University Institute in Florence. The Co-Directors of the Workshop are Philip Lowe, Mel Marquis and Giorgio Monti. Workshop participants address and critically analyse a particular set of topical issues in the field of competition law and policy. The proceedings are published in Hart's European Competition Law Annual series. This is the fifteenth in the ECLA series. It encompasses numerous chapters that examine the field of merger control from a variety of perspectives. In these chapters the contributors discuss legal and economic issues of substantive analysis, procedure, comity and best practices, as well as matters relating to the litigation of merger cases, particularly before the European Courts. The discussion also benefits from the perspectives of policy makers and experts from Canada, China, Japan, Korea, the United States and other jurisdictions and regions. Authors contributing to this book include: John Boyce Calvin Goldman Andreas Mundt Rachel Brandenburger Klaus Gugler Lars-Hendrik Röller Jochen Burrichter Barry Hawk Tadashi Shiraishi Maher Dabbah Scott Hemphill Irwin Stelzer Thomas Deisenhofer Seonghoon Jeon James Venit Götz Drauz William Kovacic Sven Völcker Kirsten Edwards Mel Marquis Vanessa Yanhua Zhang Adam Fanaki Abel Mateus Xinzhu Zhang