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

Colorado College Working Paper No. 2012-10

13 Pages Posted: 10 Jun 2012  

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

Date Written: June 10, 2012

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.

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

JEL Classification: L62, R3, L2, Q55

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: https://ssrn.com/abstract=2080863 or http://dx.doi.org/10.2139/ssrn.2080863

Jeff Moore (Contact Author)

Colorado College - Department of Economics and Business ( email )

14 E Cache La Poudre Street
Colorado Springs, CO 80903
United States

Daniel Kent Neil Johnson

Colorado College - Department of Economics and Business ( email )

14 E Cache La Poudre Street
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 )

14 E Cache La Poudre Street
Colorado Springs, CO 80903
United States
719-389-6445 (Phone)
719-389-6927 (Fax)

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