GEORGETOWN LAW The Scholarly Commons 2007 Georgetown University Law Center Georgetown Public Law and Legal Theory Research Paper No. 1005485 This paper can be downloaded free of charge from: http://scholarship.law.georgetown.edu/facpub/583 http://ssrn.com/abstract=1005485 This open-access article is brought to you by the Georgetown Law Library. Posted with permission of the author. 3 Ann. Rev. L. & Soc. Sci. 161-187 (2007)