Kwon, Soonwoo; Lee, Jihong; Lee, Sokbae - 2014
We analyze cross-country trends in technological progress over the period of 1980-2011 by examining citations data from … 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 …