Omri Ben-Shahar is the Frank and Bernice Greenberg Professor of Law at the University of Chicago. He has written extensively in the areas of contract law, products liability, and law and economics. Ben-Shahar is the editor of the Journal of Legal Studies and, recently, the book Boilerplate: Foundation of Market Contracts. Ariel Porat is Alain Poher Professor of Law at Tel-Aviv University Faculty of Law and its former Dean, as well as Fischel-Neil Distinguished Visiting Professor of Law at the University of Chicago. Porat has written numerous articles in the areas of torts and contracts and is the author of the books Contributory Fault in the Law of Contracts and Tort Liability under Uncertainty (with Alex Stein).