45. For example, the creative output of lawyers and law professors -- law review articles, briefs and other pleadings, and the like -- may well be determined largely by factors completely unrelated to the availability or unavailability of copyright protection for those works, because that category of authors, generally speaking, obtains reputational benefits from wide dissemination that far outweigh the benefits that could be obtained from licensing individual copies. See Stephen Breyer, The Uneasy Case for Copyright: A Study of Copyright in Books, Photocopies, and Computer Programs, 84 HARV. L. REV. 281, 293-309 (1970) for an analysis of the incentive structure in the scholarly publishing market; see also Tuckman & Leahey, What is an Article Worth?, 83 J. POL. ECON. 951 (1975).