Licensing contracts for newly patented innovations are observed to vary along several dimensions, including the form and size of the payment to the inventor (fixed fee versus some output-based royalty), the degree of exclusivity, and the division of rents. In this article, we show that the form...

U.S. patent reform over the past two decades has strengthened the legal enforcement of patent rights and has extended protection to new subject matter, such as genetically engineered life forms and business methods. This paper highlights these and other policy changes and the debate that this...

This article extends the theory of optimal patents to allow for costly imitation of patented innovations. With costly imitation, a rival's decision to imitate depends on the length of patent protection awarded to the patentee: the longer the patent life, the more likely it is that rivals will...

This article analyzes licensing in a noncooperative R&D game. We ask two questions: What are the incentives for licensing a production technology and what is the impact of licensing on the pattern of innovation and the consequent evolution of industry costs and market structure? The gains from...