on patents as an incentive for innovation, the effectiveness of patents for invention disclosure, patent valuation, and … what we know about the design of patent systems. We also look at what is known about some current policy areas, including … software and business method patents, university patenting, and the growth in patent litigation …

novel dataset of patent litigation in the pharmaceutical industry. We exploit a change in U.S. patent law as a natural …

Cumulative innovation is central to economic growth. Do patent rights facilitate or impede follow-on innovation? We … study the causal effect of removing patent rights by court invalidation on subsequent research related to the focal patent … Circuit to control for endogeneity of patent invalidation. Patent invalidation leads to a 50 percent increase in citations to …

of the developing world introduces patent protection for new drug products. This may lead to more research on drugs to … those already offering such protection the situation offers a unique opportunity to examine the incentive role of patent … provides a baseline' against which future research activity can be compared once the new global patent regime is fully …

bodies and private firms. One little-explored empirical testing ground is the patent system. This paper examines the … administrative practices of patent offices in sixty countries over a 150-year period. I show that the usage of patent renewal fees … economies, and those where international trade is more important-incorporate discretionary features into their patent systems …

This paper surveys the major changes in patent policy and practice that have occurred in the last two decades in the U … effects of changes in patent policy. Despite the significance of the policy changes and the wide availability of detailed data … patent policy are few. Possible reasons for these limited results are discussed, and possible avenues for future research are …

It may be advantageous to provide a variety of kinds of patent protection to heterogenous innovations. Innovations … protection in order to be encouraged. We model the problem of designing an optimal patent menu (scope and length) when the … fertility of an innovation in generating more innovations cannot be observed. The menu of patent scope can be implemented with …

Does an expansion of patent scope induce more innovative effort by firms? This article provides evidence on this … question by examining firm responses to the Japanese patent reforms of 1988. Interviews with practitioners suggest the reforms … significantly expanded the scope of patent rights in Japan, but that the average response in terms of additional R&D effort and …

strengthening of US patent rights in the early 1980s. Yet the propensity of semiconductor firms to patent has risen dramatically … markets, while spawning patent portfolio races' among capital-intensive firms …