Law clerk to Judge Joseph T. Sneed, U.S. Court of Appeals for the Ninth Circuit (1985-1986) and Justice Lewis F. Powell, Jr. of the U.S. Supreme Court (1986-1987). Practiced real estate and transactional law in Houston, Texas (1987-1991). Worked for the Justice Department as an Assistant for the Solicitor General of the United States, (1991-1994).

Joined the Columbia faculty on July 1, 2007 after holding tenured positions at the University of Michigan, University of Texas, and the Washington University School of Law. A nationally renowned scholar in the areas of secured credit, payment systems, and intellectual property, he has authored dozens of law review articles in leading law reviews, as well as pathbreaking casebooks on Payment Systems and Electronic Commerce.

He is a member of the American Law Institute, a conferee of the National Bankruptcy Conference, and a frequent visiting scholar at Federal Reserve Banks.

  • The University of Texas School of Law. Austin, TX. J.D., 1985.
  • Rice University. Houston, TX. B.A., History, 1982.