We investigate the causal effect of patent rights on cumulative innovation, using large-scale data that approximate the …

We study the blocking effect of patents on follow-on innovation by others. We posit that follow-on innovation requires … freedom to operate (FTO), which firms typically obtain through a license from the patentee holding the original innovation …. Where licensing fails, follow-on innovation is blocked unless firms gain FTO through patent invalidation. Using large …

promotion. In this paper, we assess one popular justification for feed-in tariffs, i.e., induced innovation as a positive … spillover externality. Based on regressions with a time-technology fixed effect negative binomial model, we find that innovation …