نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسندگان English
Agricultural economists have indicated that the rate of return of expenditures on agricultural R&D is relatively favourable.
Alston and Evenson (2007) say that the R&D expenditure is the core variable for the productivity factor. In this study, at first the impact of international agricultural research and human capital was estimated on productivity by Almon lag model and in the next step the rate of return international agricultural R&D on the agricultural sector of Iran was calculated. The result showed that the international R&D in agricultural sector affects on productivity after 4 years and this effect will last for 3 years .The long term coefficient of international agricultural R&D is 0.18 and the internal rate of return (IRR) was calculated up to 38% in productivity models of Iran during the period of 1979- 2008 (1358-1387) which is lower than the average rate in developing countries.
کلیدواژهها English
Alston, J. M; G.P. Parday; "Attribution and other problems in assessing the returns to agricultural R&D", Agricultural Economics, Vol 25, 2007.
Aghion, P; W. Howitt; "A model of growth through creative destruction", Econometrica, Vol 12, 1995.
shujat, A; "TFP growth in Pakistans agricultural", Pakistan Development Review, 2006.
Coe, D; E.Helpman; "International R&D spillovers", European Economic Review, Vol 39, 1997.
Fernandez, G; Shamway, R; "Research and Productivity in Mexican Agricultural", American Journal of Agricultural Economics, 1997, No. 28.
FAO, Report of R&D for Countries, 2009. www.fao.org
Gutierrez, L; "Agricultural Labour Productivity in Some Countries", Agricultural Economics Review, 2005, No. 3.
Huffman, W; Science for Agricultural, Long-Term Perspective, Iowa State University Press, 2005.
Lin, Y. J; Huffman, W. E; "Rate of return to public agricultural", research in the presence of research spillovers, American Agricultural Economics, Chicago, 2006.
Almon, S; "The Distributed Lag Between Capital Appropriations and Expenditures", Econometrica, Vol. 3, 1965.
Tokgoz, S; R&D Spill Over in Agricultural Sector of USA and Turkey; "spillovers in agricultural", Working Paper 03-WP 344, 2006.