66 Am. U. L. Rev. 1027 (2017)

*Associate Professor, Boston University School of Law.

**Associate Professor, Catholic University of America, Columbus School of Law. For comments and helpful discussions, thanks to Jonas Anderson, Kevin Clermont, Stacey Dogan, Rochelle Dreyfuss, John Duffy, Mike Harper, Tim Holbrook, Camilla Hrdy, Kathryn Kelly, Gary Lawson, Mark Lemley, Mike Meurer, John Oakley, Rachel Rebouché, Greg Reilly, Michael Risch, David Taylor, and Jeff Wall. Thanks also to Kris Hansen and Tom Gentry for outstanding research assistance.