His research areas include health policy and medical malpractice, empirical methods for causal inference, law and finance, and international corporate governance. Recent book: Medical Malpractice Litigation: How It Works; Why Tort Reform Hasn’t Helped (Cato Institute 2021, with David Hyman, Myungho Paik, William Sage, and Charles Silver). He is the founding Chairman of the annual Conference on Empirical Legal Studies (2006-2016), a founding editor of the Journal of Law, Finance and Accounting, and has run, since 2010, an annual summer workshop at Northwestern. He is among the leading empirical legal scholars in the U.S., with over 150 published articles and over 31,000 citations on Google Scholar.