of R&D. Our work analyzes knowledge diffusion and knowledge externalities in generating innovation and in determining … North America as revealed by patent citation between US-granted patents. Then we estimate the impact of these flows on … productivity of R&D resources in generating innovation (patenting) and productivity (TFP). While we find that knowledge diffusion …

contributes to innovation in source countries. We use changes in the labour mobility legislation within Europe as exogenous … variation to establish causality. By analysing patent citation data, we further provide evidence that these positive effects are …

patent quantity is driven by knowledge exchange rather than joint R&D. Firms engaged in joint R&D, on the other hand, receive … more forward citations per patent indicating that joint R&D enhances patent quality. In light of literature on strategic …&D Collaboration ; Knowledge Exchange ; Patents ; Innovation ; Count Data Models …

almost 4 million utility patents granted by the US Patent and Trademark Office (USPTO). Our estimation results on patent …, progress has been made in terms of patent quality as well as distance to the frontier. Chinese patents are of higher quality … economies of Europe and Japan have displayed steady decline in their patent quality. Finally, the US has maintained, and in some …