This book represents a comprehensive, practical guide on the law, economics, and measurement of cartel damages under UK and European competition laws. It draws together the most recent research on cartels, economic analysis, empirical techniques, case law, and legislation to examine how the quantification of losses suffered by those harmed by a cartel are, and could be, applied under European and UK competition laws. Written with the practitioner in mind, the book displays a rigorous yet pragmatic approach to the subject. Detailed discussions of leading cases complement the treatment of the application of economic theory and empirical techniques in competition law and litigation. Three appendices provide the reader with quick reference guides to statistics on European Commission Cartel Decisions (1999 to 2019), Bank of England ‘base rate’ (1980 to 2019), and where to find key documents and information. The book is a practical guide to issues of increasing importance and relevance in competition law.