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Planes, trains and automobiles : the importance of location for knowledge transfer in the transportation sector

by Lybecker, Kristina M., Moore, Jeffrey, Johnson, Daniel K. N.

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.

Note

Acquired from Department of Economics and Business.

Administrative Notes

Acquired from Department of Economics and Business.

Copyright
Copyright restrictions apply. Contact the author for permission to publish.
Publisher
None
PID
coccc:6613
Digital Origin
born digital
Extent
13 pages : illustrations (some color)