Collusion remains a strong undercurrent of business practice despite anti-cartel enforcement being a top priority of competition authorities. Alongside active prosecution of cartels, the study of cartels is a vibrant area of research for economic and legal scholars. A challenge for both practice and scholarship is that cartels evolve, as colluding firms continuously devise new methods to circumvent competition. Cartels Diagnosed presents twelve gripping cartel case studies of collusion from key business sectors such as the airline industry, the gasoline industry, and big pharma. Written by renowned economists, these concise and accessible case studies deliver novel insights into cartel formation, facilitating practices, cartels' modus operandi, and the efficacy of cartels. Assisting in understanding new cartel mechanisms and their effects, developing new policies to deter and destabilize cartels, and measuring harm, this volume on cartel morphology is an invaluable reference for supporting public and private enforcers in detecting and prosecuting cartels.