Is the Irrigation Water Demand Really Convex ?
The seasonal irrigation water demand under uncertainty, which lies at the core of this paper, is still very roughly known. We know, however, that irrigated agriculture accounts for a large proportion of water use, especially in many water-scarce areas. In this paper, we estimate the irrigation water demand, for various climatic conditions characterizing the distribution of the necessarily stochastic, demand functions under uncertainty. We use a dynamic programming model to represent the farmer's decision program under uncertainty. A crop-growth simulation model (EPIC-PHASE), provides the response function to the decisions taken and climatic events and is linked to a CRRA utility function representing the farmer's objective function. This model is used to generate the data allowing the estimation of irrigation water demand by a nonparametric procedure. An application to irrigation water demand is proposed in the South-West of France. We show that the estimated demand functions present four main areas: For very small quantities, where the farmer considers water as an essential input to crop growth, the demand is inelastic. The second area corresponds to mean quantities where the plant has reached a satisfactory level of growth; water is no more an essential input and is not yet a risk reducing input. The farmer is more responsive to change in water price. But, we find a third, non-intuitive, area for larger quantities where the water is a risk reducing input and the demand becomes inelastic again. The last area is classic, the water demand is obviously elastic for important total water quantities. This result is of great importance to analyze a regulation policy.
(This abstract was borrowed from another version of this item.)
To our knowledge, this item is not available for
download. To find whether it is available, there are three
1. Check below under "Related research" whether another version of this item is available online.
2. Check on the provider's web page whether it is in fact available.
3. Perform a search for a similarly titled item that would be available.
|Date of creation:||2001|
|Date of revision:|
|Contact details of provider:|| Postal: LASER, Faculté d'Economie, Avenue Raymond Dugrand, CS 79606, 34960 MONTPELLIER Cedex 2, France|
Web page: http://www.laser.univ-montp1.fr
More information through EDIRC
References listed on IDEAS
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.:
- Shumway, C. Richard, 1973. "Derived Demand For Irrigation Water: The California Aqueduct," Southern Journal of Agricultural Economics, Southern Agricultural Economics Association, vol. 5(02), December.
- Chavas, Jean-Paul & Holt, Matthew T, 1996. "Economic Behavior under Uncertainty: A Joint Analysis of Risk Preferences and Technology," The Review of Economics and Statistics, MIT Press, vol. 78(2), pages 329-35, May.
- Moore, Michael R. & Gollehon, Noel R. & Carey, Marc B., 1994. "Alternative models of input allocation in multicrop systems: irrigation water in the central plains, United States," Agricultural Economics, Blackwell, vol. 11(2-3), pages 143-158, December.
- Varela-Ortega, Consuelo & M. Sumpsi, Jose & Garrido, Alberto & Blanco, Maria & Iglesias, Eva, 1998.
"Water pricing policies, public decision making and farmers' response: implications for water policy,"
Blackwell, vol. 19(1-2), pages 193-202, September.
- Varela-Ortega, Consuelo & Sumpsi, Jose M. & Garrido, Alberto & Blanco, Maria & Iglesias, Eva, 1998. "Water pricing policies, public decision making and farmers' response: implications for water policy," Agricultural Economics of Agricultural Economists, International Association of Agricultural Economists, vol. 19(1-2), September.
- Thomas, Alban & Bontems, Philippe, 1998. "Information Value And Risk Premium In Agricultural Production Under Risk: The Case Of Split Nitrogen Application For Corn," 1998 Annual meeting, August 2-5, Salt Lake City, UT 20844, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).
When requesting a correction, please mention this item's handle: RePEc:mop:lasrwp:2001.04. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Jean-Christophe POUDOU)
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
If references are entirely missing, you can add them using this form.
If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.
Please note that corrections may take a couple of weeks to filter through the various RePEc services.