Where are the Eco-Innovators? Analysis of the Knowledge Flows between Successive Generations of Green Technology Innovations
Colorado College Working Paper 2012-02
7 Pages Posted: 19 Mar 2012
Date Written: March 2012
Abstract
This paper examines the location of innovations within green technology, using U.S. patent citation data to trace their inter-generational knowledge flows over time. Clustering is clearly evident, and we use multivariate left-censored Tobit regression analysis to control for identifiable factors, to show that the distance between successive innovators has not been rising over time. The interesting exception is nuclear energy in which distance appears to be decreasing over time. If we consider only inter-city transfers, the waste management also becomes more concentrated over time, while transportation declusters.
Keywords: Geographical Clustering, Patents, Knowledge Flows, Patents, Green Technology
JEL Classification: Q55, L9, L2.
Suggested Citation: Suggested Citation
Do you have negative results from your research you’d like to share?
Recommended Papers
-
Bilateral Collaboration and Emergent Networks
By Robin Cowan, Nicolas Jonard, ...
-
How the West Has Won: Regional and Industrial Inversion in U.S. Patent Activity
By Daniel K. N. Johnson and Amy Brown
-
The Demise of Distance? The Declining Role of Physical Distance in Knowledge Transmission
-
It's a Small(Er) World: The Role of Geography in Biotechnology Innovation
-
Are Many Heads Better than Two? Recent Changes in International Technological Collaboration
-
Sure, but Who has the Energy? The Importance of Location for Knowledge Transfer in the Energy Sector
By Jeff Moore, Daniel K. N. Johnson, ...
-
Six Degrees of GM Bacon: Network Analysis of Biotechnology Inventors