We present new data on research spillovers between nations and between industries, discussing some theoretical and measurement issues. Our technique makes patent data more useful and practical for economic analysis, allowing analysis of the industries of manufacture and sectors of use for...

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...

This paper considers the challenges to the dissemination of environmental innovation. Following a brief exploration of the legal and regulatory regimes surrounding environmental technologies, the paper examines diffusion mechanisms, market factors, social characteristics and political elements...