This paper uses a gravity framework to investigate the effects of distance as well as subnational and national borders 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...

The People's Republic of China (PRC) has received enormous inflows of foreign direct investment (FDI) in recent years, including significant flows from Japan and the United States (US). We examine these investment flows in detail to gain perspectives on their relative importance for the three...