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Climate variability and maize yield in South Africa: Results from GME and MELE methods

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Author Info
Akpalu, Wisdom
Hassan, Rashid M.
Ringler, Claudia

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Abstract

"This paper investigates the impact of climate variability on maize yield in the Limpopo Basin of South Africa using the Generalized Maximum Entropy (GME) estimator and Maximum Entropy Leuven Estimator (MELE). Precipitation and temperature were used as proxies for climate variability, which were combined with traditional inputs variables (i.e., labor, fertilizer, seed, and irrigation). We found that the MELE fits the data better than the GME. In addition, increased precipitation, increased temperature, and irrigation have a positive impact on yield. Furthermore, results of the MELE show that the impact of precipitation on maize yield is stronger than that of temperature, meaning that the impact of climate variability on maize yield could be negative if the change increases temperature but reduces precipitation at the same rate and simultaneously. Moreover, the impact of irrigation on yield is positive but with a lower elasticity coefficient than that of precipitation, which supposes that irrigation may only partially mitigate the impact of reduced precipitation on yield. " from authors' abstract

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Paper provided by International Food Policy Research Institute (IFPRI) in its series IFPRI discussion papers with number 843.

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Date of creation: 2008
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Handle: RePEc:fpr:ifprid:843

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Keywords: Yield function; maize; Generalized maximum entropy; Maximum entropy Leuven estimator; Climate variability; Climate change;

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  2. Dercon, Stefan & Gilligan, Daniel O. & Hoddinott, John & Woldehan, Tassew, 2008. "The impact of agricultural extension and roads on poverty and consumption growth in fifteen Ethiopian villages:," IFPRI discussion papers 840, International Food Policy Research Institute (IFPRI). [Downloadable!]
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  3. Cudjoe, Godsway & Breisinger, Clemens & Diao, Xinshen, 2008. "Local impacts of a global crisis: Food price transmission and poverty impacts in Ghana," IFPRI discussion papers 842, International Food Policy Research Institute (IFPRI). [Downloadable!]
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  11. Schiffer, Eva & McCarthy, Nancy & Birner, Regina & Waale, Douglas & Asante, Felix, 2008. "Information flow and acquisition of knowledge in water governance in the Upper East Region of Ghana:," IFPRI discussion papers 820, International Food Policy Research Institute (IFPRI). [Downloadable!]
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  2. Xu, Chenggang & Zhang, Xiaobo, 2009. "The evolution of Chinese entrepreneurial firms: Township-village enterprises revisited," IFPRI discussion papers 854, International Food Policy Research Institute (IFPRI). [Downloadable!]
  3. Thurlow, James & George, Gavin & Gow, Jeff, 2009. "HIV/AIDS, growth and poverty in KwaZulu-Natal and South Africa: Integrating firm-level surveys with demographic and economywide modeling," IFPRI discussion papers 864, International Food Policy Research Institute (IFPRI). [Downloadable!]
  4. Banful, Afua Branoah, 2009. "Do institutions limit clientelism?: A study of the district assemblies common fund in Ghana," IFPRI discussion papers 855, International Food Policy Research Institute (IFPRI). [Downloadable!]
  5. Diao, Xinshen, 2009. "Economywide impact of avian flu in Ghana: A dynamic CGE model analysis," IFPRI discussion papers 866, International Food Policy Research Institute (IFPRI). [Downloadable!]
  6. Badibanga, Thaddee & Diao, Xinshen & Roe, Terry & Somwaru, Agapi, 2009. "Dynamics of structural transformation: An empirical characterization in the case of China, Malaysia, and Ghana," IFPRI discussion papers 856, International Food Policy Research Institute (IFPRI). [Downloadable!]
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  8. Magalhaes, Eduardo & Diao, Xinshen, 2009. "Productivity convergence in Brazil: The case of grain production," IFPRI discussion papers 857, International Food Policy Research Institute (IFPRI). [Downloadable!]
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