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Estimating the impact of innovation systems on maize yields: the case of Iar4d in southern Africa

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  • Siziba, Shephard
  • Nyikahadzoi, Kefasi
  • Nyemeck, Joachim Binam
  • Diagne, Aliou
  • Adewale, Adekunle
  • Oluwole, Fatunbi

Abstract

Markets are known to have a great potential to unlock agricultural growth in developing countries. The conventional agricultural research and development approaches used hitherto have not yielded much success in stimulating farmer participation in markets. New agricultural development approaches, such as the Integrated Agricultural Research for Development (IAR4D), view developmental challenges as multi-dimensional and as such require multi-pronged and integrated initiatives – better known as innovation systems – to overcome. Using data from IAR4D trials in Zimbabwe, Malawi and Mozambique, the study evaluates the efficacy of IAR4D in stimulating market integration and crop intensification. The impact of IAR4D on maize yield, estimated using the local average treatment effect (LATE) is significant in all the countries. Yields improved by margins ranging 107–149 kgha-1, which is quite substantial in a region where yields average around 1000kgha-1. These findings give credence to the proposition that innovation systems such as IAR4D are more effective in stimulating agricultural growth.

Suggested Citation

  • Siziba, Shephard & Nyikahadzoi, Kefasi & Nyemeck, Joachim Binam & Diagne, Aliou & Adewale, Adekunle & Oluwole, Fatunbi, 2013. "Estimating the impact of innovation systems on maize yields: the case of Iar4d in southern Africa," Agrekon, Agricultural Economics Association of South Africa (AEASA), vol. 52(3), March.
    • Handle: RePEc:ags:agreko:345256
    DOI: 10.22004/ag.econ.345256
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    1. Dorward, Andrew & Fan, Shenggen & Kydd, Jonathan & Lofgren, Hans & Morrison, Jamie & Poulton, Colin & Rao, Neetha & Smith, Laurence & Tchale, Hardwick & Thorat, Sukhadeo & Urey, Ian & Wobst, Peter, 2004. "Institutions and economic policies for pro-poor agricultural growth," DSGD discussion papers 15, International Food Policy Research Institute (IFPRI).
    2. Guido W. Imbens & Jeffrey M. Wooldridge, 2009. "Recent Developments in the Econometrics of Program Evaluation," Journal of Economic Literature, American Economic Association, vol. 47(1), pages 5-86, March.
    3. Peter Timmer, C., 1988. "The agricultural transformation," Handbook of Development Economics, in: Hollis Chenery & T.N. Srinivasan (ed.), Handbook of Development Economics, edition 1, volume 1, chapter 8, pages 275-331, Elsevier.
    4. Staatz, John M., 1994. "The Strategic Role of Food and Agricultural Systems in Fighting Hunger Through Fostering Sustainable Economic Growth," Staff Paper Series 201190, Michigan State University, Department of Agricultural, Food, and Resource Economics.
    5. Cadot, Olivier & Dutoit, Laure & Olarreaga, Marcelo, 2006. "How costly is it for poor farmers to lift themselves out of poverty?," Policy Research Working Paper Series 3881, The World Bank.
    6. Abadie, Alberto, 2003. "Semiparametric instrumental variable estimation of treatment response models," Journal of Econometrics, Elsevier, vol. 113(2), pages 231-263, April.
    7. repec:bla:devpol:v:24:y:2006:i:3:p:243-277 is not listed on IDEAS
    8. Martin Ravallion, 2001. "The Mystery of the Vanishing Benefits: An Introduction to Impact Evaluation," The World Bank Economic Review, World Bank, vol. 15(1), pages 115-11-140.
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