Copyright lawyers talk and write a lot about the uncertainties of fair use and the deterrent effects of a clearance culture on publishers, teachers, filmmakers, and the like, but we know less about the choices people make about copyright on a daily basis, especially when they are not at work....

Today's technology turns every computer - every hard drive - into a type of library. But the institutions traditionally known as libraries have been given special consideration under copyright law, even as commercial endeavors and filesharing programs have begun to emulate some of their...