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 …

Patent citation data are used in a growing body of economics and business research on technological diffusion. Until … now, there exists little evidence on whether patent citations are a good measure of knowledge flows. Our paper assesses … the legitimacy of using European patent citations as a measure of technology flows. It uses information from the Community …