Authors: Johnson, DKN Evenson, RE

Citation: Dkn. Johnson et Re. Evenson, How far away is Africa? Technological spillovers to agriculture and productivity, AM J AGR EC, 82(3), 2000, pp. 743-749

Authors: Johnson, DKN Santaniello, V

Citation: Dkn. Johnson et V. Santaniello, Biotechnology inventions: What can we learn from patents?, AGRICULTURE AND INTELLECTUAL PROPERTY RIGHTS, 2000, pp. 169-195

Authors: Johnson, DKN Evenson, RE

Citation: Dkn. Johnson et Re. Evenson, R&D spillovers to agriculture: Measurement and application, CONT ECON P, 17(4), 1999, pp. 432-456