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.
Details
Title
It's a Small(Er) World: the Role of Geography in Biotechnology Innovation
Series
Faculty working papers (Colorado College. Dept. of Economics and Business)
Notes
Acquired as PDF from Colorado College Department of Economics and Business. Converted to PDF/A1.b using Adobe Acrobat Professional. Contact the author for permission to publish.
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