In this paper we raise questions concerning the widely accepted proposition that economic efficiency requires that copyright protection be limited in its duration (often shorter than the current term). We show that just as an absence of property rights in tangible property would lead to...

When individuals infringe copyright, they often use tools, services, and venues provided by other parties. An enduring legal question asks to what extent those other parties should be held liable for the resulting infringement. For example, should a firm that produces photocopiers be required to...