We investigate the value creation or destruction associated with the introduction of software patents in the United …) firms around the time of important court decisions that impacted software patents, and the second analyzes the relationship … between firms' stock market value, the sector in which they operate, and their holdings of software patents. We conclude that …

issued by the European Patent Office (EPO) and the US Patent and Trademark Office (USPTO). We find that Tobin's q is … citations, family size and the number of technical fields covered by the patent are modestly informative for value. Software … patents account for a rising share of total patents in the USPTO and EPO. Moreover, some scholars of innovation and …

presents estimates of the effect of patent protection on the depreciation rate. Results suggest that the yearly depreciation … averaging 8-9 per cent. Patent protection slows down the erosion of profits by about 1-2 percentage points …

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 … relating to patenting, robust conclusions regarding the empirical consequences for technological innovation of changes in …

fertility of an innovation in generating more innovations cannot be observed. The menu of patent scope can be implemented with …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 …

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 …

How do non-practicing entities ("Patent Trolls") impact innovation and technological progress? Although this question …", who exploit the patent system to extract rents and thereby hurt innovation. We employ unprecedented access to NPE …-derived patent and financial data, as well as a novel model that guides our data analysis. We find that NPEs acquire patents from …

Continuations allow inventors to claim technology developed after the original filing date of their patent, leading to …

I survey some recent research on the role of patents in encouraging innovation and growth in developing economies …, beginning with a brief history of international patent systems and facts about the current use of patents around the world. I … discuss research on the implications of patents for international technology transfer and domestic innovation. This is …