共 26 条
- [2] Sequential adoption of site-specific technologies and its implications for nitrogen productivity: A double selectivity model. M Khanna. American Journal of Agricultural Economics . 2001
- [3] Risk,Schooling and the Choice of Seed Technology in Developing Countries:A Meta-Profit Function Approach. Mark M.Pitt,,Gunawan Sumodiningrat. International Economic Journal . 1991
- [4] Hybrid corn: an exploration in the economics of technological change. Griliches Z. Econometrica . 1957
- [5] Adoption of agricultural innovations in developing countries: a survey. Feder G,Just RE,Zilberman D. Economic Development and Cultural Change . 1985
- [6] Econometric Analysis. Greene William H. . 2000
- [7] 中国农业科技投资经济[M]. 中国农业出版社 , 黄季〓等著, 2000