Jaffe, Adam B.; Henderson, Rebecca M.; Trajtenberg, Manuel - 2021
We compare the geographic location of patent citations to those of the cited patents, as evidence of the extent to … which knowledge spillovers are geographically localized. We find that citations to U.S. patents are more likely to come from … the U.S., and more likely to come from the same state and SMSA as the cited patents than one would expect based only on …