0 Regulation (agencies) versus litigation (courts) : an analytical framework / Richard A. Posner -- Efficient regulation / Andrei Shleifer -- The trouble with cases / Frederick Schauer and Richard Zeckhauser -- Tobacco regulation through litigation : the master settlement agreement / W. Kip Viscusi and Joni Hersch -- Gun control after Heller : litigating against regulation / Philip J. Cook, Jens Ludwig, and Adam Samaha -- The effects of product liability exemption in the presence of the FDA / Tomas J. Philipson, Eric Sun, and Dana Goldman -- The impact of employment protection on workers disabled by workplace injuries / Adam H. Gailey and Seth A. Seabury -- Opting out of workers' compensation in Texas : a survey of large, multi-state nonsubscribers / Alison Morantz -- M&A break fees : U.S. litigation versus UK regulation / John C. Coates IV -- Exploring ex ante regulatory mechanisms for detecting prescription drug misuse / Stephen T. Parente -- Natural disaster management : earthquake risk and hospitals' provision of essential services in California / Tom Chang and Mireille Jacobson.