Twenty one years ago, copyright died. More accurately, it was killed. In 1996, in ProCD v. Zeidenberg, Judge Easterbrook, writing for the Seventh Circuit, held that a contract that restricted the use of factual information was not preempted by the Copyright Act and therefore enforceable. The...

Post-grant validity challenges at patent offices rely on the private initiative of third parties to correct mistakes made by patent offices. We hypothesize that incentives to bring post-grant validity challenges are reduced when many firms benefit from revocation of a patent and when firms are...