Climate variability and maize yield in South Africa: Results from GME and MELE methods
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
Download InfoIf you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
Bibliographic InfoPaper provided by International Food Policy Research Institute (IFPRI) in its series IFPRI discussion papers with number 843.
Date of creation: 2008
Date of revision:
Yield function; maize; Generalized maximum entropy; Maximum entropy Leuven estimator; Climate variability; Climate change;
This paper has been announced in the following NEP Reports:
- NEP-AFR-2009-01-17 (Africa)
- NEP-AGR-2009-01-17 (Agricultural Economics)
- NEP-ALL-2009-01-17 (All new papers)
- NEP-ENV-2009-01-17 (Environmental Economics)
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Sergio H. Lence & Douglas J. Miller, 1998.
"Recovering Output-Specific Inputs from Aggregate Input Data: A Generalized Cross-Entropy Approach,"
American Journal of Agricultural Economics,
Agricultural and Applied Economics Association, vol. 80(4), pages 852-867.
- Lence, Sergio H. & Miller, Douglas, 1998. "Recovering Output-Specific Inputs from Aggregate Input Data: A Generalized Cross Entropy Approach," Staff General Research Papers 1305, Iowa State University, Department of Economics.
- Mabiso, Athur & Weatherspoon, Dave D., 2008. "Fuel and Food Tradeoffs: A Preliminary Analysis of South African Food Consumption Patterns," 2008 Annual Meeting, July 27-29, 2008, Orlando, Florida 6126, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).
- Msangi, Siwa & Howitt, Richard E., 2006. "Estimating Disaggregate Production Functions: An Application to Northern Mexico," 2006 Annual meeting, July 23-26, Long Beach, CA 21080, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).
- Mendelsohn, Robert & Nordhaus, William D & Shaw, Daigee, 1994. "The Impact of Global Warming on Agriculture: A Ricardian Analysis," American Economic Review, American Economic Association, vol. 84(4), pages 753-71, September.
- Quirino Paris, 2001. "Multicollinearity and maximum entropy estimators," Economics Bulletin, AccessEcon, vol. 3(11), pages 1-9.
- Golan, Amos & Judge, George G. & Miller, Douglas, 1996. "Maximum Entropy Econometrics," Staff General Research Papers 1488, Iowa State University, Department of Economics.
- Quirino Paris & Richard E. Howitt, 1998. "An Analysis of Ill-Posed Production Problems Using Maximum Entropy," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 80(1), pages 124-138.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: ().
If references are entirely missing, you can add them using this form.