destruction by increasing the entrepreneurial effort allocated to high-quality invention projects. Using detailed data on patents …

This paper analyzes the effect of an increase in patent scope on R&D and innovation. It presents a model where patent … duplication of R&D. The model predicts that an increase in patent scope can increase the probability of innovation if the … technology. However, when the model is extended to Stackelberg competition or licensing, the benefit of a broad patent scope to a …