Assistant Professor of Economics, Khoy Branch, Islamic Azad University, Iran


Nowadays, agricultural R&D provides new and developed technologies to create modern agricultural producing methods. During recent years, improving agricultural productivity is affected by not only domestic R&D investments but also foreign countries R&D investments. Nowadays, according to new growth models, R&D is the base of productivity. Recent economic theories consider agricultural research and it's spill overs as important factors for technological change and economic growth. This paper investigates the amount of agricultural total factor productivity in Iran and analyzes the relationship between TFP, domestic agricultural research, and foreign agricultural R&D during 1979–2008. In this study Iran's partners are 20 Asian, European and South American countries. The Solow residual index approach is applied for the measurement of total factor productivity in agricultural sector of Iran. ARDL model involving different lag length specifications were estimated taking TFP as a dependent variable. The results indicate that agricultural researches (both domestic and foreign R&D) have positive and significant impact on agricultural TFP. But the impact of foreign R&D on agricultural productivity is stronger than the effect of domestic R&D. According to gained results considerable portion of national product should be allocated to R&D costs and research budget of agricultural sector should be increased to standard level. Also government should pay attention to its partner countries because agricultural R&D spillover of developed countries is more than developing countries.


1- Aghion, P. (1995). A Model of Growth ThroughCreative Destruction, Econometrica, 12: 121-145.
2- Alston, J.(2003). Attribution and other Problemsin Assessing the Returns to Agricultural R& D, Agri-Cultural Economics, 25: 21-45.
3- Amini, A. (2004). Measurement and Analysis ofEffective Factors on Total Productivity of Economyin Iran. Peik Nour Publication, 2: 54-78.
4- Bagherzadeh, A. (2007). Theory of Economic Efficiency,Arad Publication, Tehran. Pp:189-204.
5- Coe, D., & Helpman, E. (1997). International R&Dspillovers, European Economic Review, 39: 12-30.
6- Evenson, R. (2000). Agricultural Research and ProductivityGrowth in India, IFPRI,Washington, 2: 65-80.
7- FAO. (2009). Report of R&D for Countries,
8- Griliches, Z. (1989). Productivity Puzzles and R&D, Economic Perspectives, 2: 31-50.
9- Gutierrez, L. (2005). Agricultural Labour Productivityin Some Countries, Agricultural EconomicsReview, 3: 12-24.
10- Gutierrez, L.(2005). Why is Agricultural LaborProductivity Higher in Some Countries than others?Agricultural Economics Review, 13: 20-31.
11- Huffman, W. (2006). Science for Agricultural; Long–Term Perspective, Iowa State UniversityPress. Pp: 126-158. [DOI via Crossref]   
12- IFPRI. (2009). Agricultural Science and Technology Indicators (ASTI), Site
13- Jacobs, D. (2004). R&D Spill Overs to Agricultural Measurement and Application, Economic Policy,11: 40-57.
14- Kandric, A., & Crimer, S. (1970). The Index ofProductivity for Economics, Economic Policy Journals,12: 44-62.
15- Khalilian, S. (2008). The Study of Effective Factorson Value Added in Industry and Agricultural Sectors, Agricultural papers, Mashhad, 2: 28-43.
16- Komijani, A., & Shah Abadi, A. (2007). The Effect of Ddomestic and Foreign R&D Activities on TFP, Journal of Commercial Surveys, 1: 10-22.
17- Line, Y. (2006). Rate of Return to Public Agricultural Research in the Presence of Research Spillovers, American Agricultural Economics, 21: 88-98.
18- Noferesti, M., & Arab Mazar, A. (2005). TheSstudy of Macroeconomic Model in Iran, Economic Ministry, Tehran. Pp: 120-179.
19- Pesaran, M., & Shin, T. (1998). Working withMicrofit 4.0.Oxford University Press. Pp: 120-148.
20- Schimmel Pfenning, H., & Leftly, A. (2006).Concepts of Productivity Measurement in Agriculture, Journal of Development and agricultural economics,8: 55-78.
21- Shujat, A., & Iqbal, H. (2007). The Survey ofTFP in Pakistan, Case Study of Agricultural Sector, Indian Agricultural Economics Journals, 16: 31-56.
22- Tokgoz, S. (2004). R&D spillovers in agricultural, Journal of Econometrics, 31: 12-41.