This new edition of Conor Quigley's book (originally "EC State Aid Law and Policy"), offers the most comprehensive and detailed examination of this fast developing field of Community law. The book is designed to provide practitioners and Commission officials with a definitive statement of the law and practice across the many sectors where issues of State aid come into play. At the same time, placing State aid law and policy in its commercial and industrial context, the book fully explores the concept of State aid and its function as a tool of Community law and economic development. All of this is achieved by means of the most thorough available examination of the jurisprudence of the European Courts and the decisions of the Commission in declaring certain aid compatible with the common market. The Commission's supervisory powers as well as the means of enforcing State aid law in the courts are also fully explained.