Authors’ Note on Method: One of the commenters on a preliminary draft of this article suggested that we have a love-hate relationship with law and economics. Perhaps a better metaphor would be that we are prodigal sons. We both studied under the great Guido Calabresi, one of the founders of Law and Economics. We revere him as a mentor, and we believe that we are applying and extending his work to our field. We both also learned a great deal from professors Bruce A.