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...

Public-private partnerships can have a particular impact on sectors where a public service needs to be sustained by the best available professional and technological knowledge in a condition of scarce resources. The growing trend of international-patient mobility suggests, the opportunity to...