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 …

engineering articles (Thompson Citation Index) and patents (US Patent Office in the United States, European Patent Office in … Europe and the Japanese Patent Office in Japan). This ground-breaking volume offers a wealth of information for professors …

in knowledge spillovers. Drawing on the NBER Patent Citations Database, we examine patent citations data at metropolitan … level within the U.S. and the 38 largest patent-cited countries outside the U.S. We present 3 key findings: First, we find … of cited patent, which implies that new knowledge faces the largest barriers to diffusion. However, over time, border and …