This third edition of the State Action Practice Manual continues to be the most comprehensive published source of information and guidance concerning the state action doctrine. This book addresses not only the historical development and theoretical underpinnings of the state action doctrine, but also many practical considerations that arise in the application of the doctrine, including pleading and procedural issues and strategy and the role of discovery and expert testimony in cases applying the state action doctrine. The State Action Practice Manual is an important source of information on the state action doctrine for a wide range of antitrust practitioners representing clients that are subject to state regulation and thus may be protected from federal antitrust liability under the doctrine. For practitioners who do not specialize in antitrust, it provides an accessible source of guidance on the state action doctrine. This manual will also be of interest to practitioners at the federal and state antitrust enforcement agencies.