This paper examines the trends in geographic localization of knowledge spillovers via patent citations, extracting multiple cohorts of new sample US patents from the period of 1976-2015. Despite accelerating globalization and widespread perception of the "death of distance," our matched-sample...

This paper examines the trends in geographic localization of knowledge spillovers via patent citations, considering US patents from the period of 1976-2015. Despite accelerating globalization and widespread perception of the \death of distance," our multi-cohort \matched-sample" study reveals...

Since the 1980s, the US has experienced a surge in patenting and R&D. To better understand the phenomena, we explore the evolution of the market value of knowledge capital with a novel firm-level dataset. While the importance of R&D has steadily declined, the market value of patents made a large...