Abstract

http://ssrn.com/abstract=2080863
 
 

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Planes, Trains and Automobiles: The Importance of Location for Knowledge Transfer in the Transportation Sector


Jeff Moore


Colorado College - Department of Economics and Business

Daniel K. N. Johnson


Colorado College - Department of Economics and Business

Kristina M. Lybecker


Colorado College - Department of Economics & Business

June 10, 2012

Colorado College Working Paper No. 2012-10

Abstract:     
Using over 200,000 U.S. patent citations, we test whether knowledge transfers in the transportation sector are sensitive to distance, and whether that sensitivity has changed over time. Controlling for self-citation by inventor, assignee and examiner, multivariate regression analysis shows that physical distance is becoming less important for spillovers with time, albeit in a nonlinear fashion.

Number of Pages in PDF File: 13

Keywords: Transportation Sector, Patents, Knowledge Clustering, Left-censored Tobit

JEL Classification: L62, R3, L2, Q55

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Date posted: June 10, 2012  

Suggested Citation

Moore, Jeff and Johnson, Daniel K. N. and Lybecker, Kristina M., Planes, Trains and Automobiles: The Importance of Location for Knowledge Transfer in the Transportation Sector (June 10, 2012). Colorado College Working Paper No. 2012-10. Available at SSRN: http://ssrn.com/abstract=2080863 or http://dx.doi.org/10.2139/ssrn.2080863

Contact Information

Jeff Moore (Contact Author)
Colorado College - Department of Economics and Business ( email )
Colorado Springs, CO 80903
United States
Daniel Kent Neil Johnson
Colorado College - Department of Economics and Business ( email )
Colorado Springs, CO 80903
United States
719-389-6654 (Phone)
719-389-6927 (Fax)
HOME PAGE: http://faculty1.coloradocollege.edu/~djohnson
Kristina M. Lybecker
Colorado College - Department of Economics & Business ( email )
Colorado Springs, CO 80903
United States
719-389-6445 (Phone)
719-389-6927 (Fax)
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