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The Healing Arts: Analysis of the Knowledge Flows between Successive Generations of Innovation in the Pharmaceutical SectorDaniel K. N. JohnsonColorado College - Department of Economics and Business Jeff MooreColorado College - Department of Economics and Business Kristina M. LybeckerColorado College - Department of Economics & Business May 2012 Colorado College Working Paper No. 2012-08 Abstract: This paper examines the location of innovations within pharmaceutical technology, using U.S. patent citation data to trace the knowledge flows over time. It is clear that knowledge clustering is certainly present. Our study utilizes multivariate left-censored Tobit regression analysis to control for identifiable factors, to examine whether over time the distance between successive innovators has changed. We find the distance to be increasing significantly over time, both when considering all citations and only inter-city transfers.
Number of Pages in PDF File: 8 Keywords: Pharmaceutical Technology, Patents, Knowledge Clustering, Left-censored Tobit JEL Classification: L69, R3, L2, Q55 working papers seriesDate posted: May 24, 2012Suggested CitationContact Information
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