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...

"Global trade is a key driver for economic growth, and trade is related to several dimensions: The Fourth Industrial Revolution (4IR) with disruptive technologies, globalisation of markets, innovation leading to new trade opportunities, as well as foreign investments following exports lead to...