TY  - BOOK
AU  - Clancy,Matthew S.
AU  - Heisey,Paul
AU  - Ji,Yongjie
AU  - Moschini,GianCarlo
ED  - National Bureau of Economic Research.
TI  - The Roots of Agricultural Innovation: Patent Evidence of Knowledge Spillovers 
T2  - NBER working paper series
PY  - 2020///
CY  - Cambridge, Mass.
PB  - National Bureau of Economic Research
N1  - April 2020; Hardcopy version available to institutional subscribers
N2  - This chapter investigates the extent to which agricultural innovations draw on ideas originating outside of agriculture. We identify a large set of US patents for agricultural technologies granted between 1976 and 2018. To measure knowledge spillovers to these patents, we rely on three proxies: patent citations to other patents, patent citations to the scientific literature, and a novel text analysis to identify and track new ideas in the patent text. We find that more than half of knowledge flows originate outside of agriculture. The majority of these knowledge inflows, however, still originate in domains that are close to agriculture
UR  - https://www.nber.org/papers/w27011
UR  - http://dx.doi.org/10.3386/w27011
ER  -