Colorado College Working Paper No. 2006-03
23 Pages Posted: 15 Jan 2002
Date Written: August 2006
Using patent citation data for the U.S., we test whether knowledge spillovers in biotechnology are sensitive to distance, and whether that sensitivity has changed over time. Controlling for self-citation by inventor, assignee and examiner, cohort-based regression analysis shows that physical distance is becoming less important for spillovers with time.
Keywords: biotechnology, innovation, patent, citation, distance, geography
JEL Classification: L6, N9, O3, R1
Suggested Citation: Suggested Citation
Johnson, Daniel K. N., It's a Small(er) World: The Role of Geography in Biotechnology Innovation (August 2006). Available at SSRN: https://ssrn.com/abstract=296813 or http://dx.doi.org/10.2139/ssrn.296813