Key points are not available for this paper at this time.
Patent Citations and the Geography of Knowledge Spillovers: A Reassessment by Peter Thompson and Melanie Fox-Kean. Published in volume 95, issue 1, pages 450-460 of American Economic Review, March 2005
Thompson et al. (Tue,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: