Ain't No Sunshine When You're Gone: Analysis of the Knowledge Flows between Successive Generations of Solar Innovations
Colorado College Working Paper No. 2012-09
8 Pages Posted: 10 Jun 2012
Date Written: June 10, 2012
This paper examines the location of innovations within solar technology, using U.S. patent citation data to trace their diffusion over time. Knowledge clustering is clearly present. We employ multivariate left-censored Tobit regression analysis to control for identifiable factors, to examine whether the distance between successive innovators has changed over time. We find the distance to be increasing slightly over time, both when considering all citations and only inter-city transfers.
Keywords: Solar Technology, Patents, Knowledge Clustering, Left-censored Tobit
JEL Classification: L99, R3, L2, Q55
Suggested Citation: Suggested Citation