Using a dynamic model of patent races for two sequential innovations, Scotchmer & Green (1990) compared the effect on R&D incentives of the two patent-issuing rules, first-to-invent and first-to-file, and found first-to-file more conducive to R&D. We show that their result depends on their...

This paper explores the linkage between protection and the speed with which a protected firm adopts new technology. Of primary importance here is the distinction between permanent and temporary protection on the one hand, and between tariffs and quotas on the other. The authors find that a...