Effect of scale on water users’ associations’ performance in Tunisia: nonparametric model for scale elasticity calculation
The paper aims to investigate the economies of scale of Water Users’ Associations (WUA) in Tunisia. During the last years there has been a lot of discussion in Tunisia about the optimal size of WUAs, which allows more efficient management of the water resources at the local level. In this work we propose to see if the size of the WUA in the governorate of Nabeul (Central-Eastern part of Tunisia) would have to increase or decrease in order to maximize their efficiency. Apart from this qualification we also quantify the scale efficiency and scale elasticity of the WUA using Data Envelopment Analysis (DEA) models. The results show that the output space (volume of water distributed and number of ha managed and irrigated) of the WUA that attain a high level of scale efficiency is highly diverse, indicating that the number of ha irrigated and the volume of water distributed are not explaining the differences in the scale efficiency of WUA. The calculation of scale elasticity of the WUA shows that 41% of the WUA are operating at decreasing returns to scale (DRS) while 16% and 43% operate at constant (CRS) and increasing (IRS) returns to scale, respectively. The scale orientation was found to be depending on the output density rather than on the output size. Thus, WUA located in more irrigation-intensified areas were found to be IRS oriented. WUA operating at CRS were found to have the minimum costs, which is in line with the theoretical predictions that suggest that the average productivity is maximized when the scale efficiency is equal to 1.
|Date of creation:||Sep 2010|
|Date of revision:|
|Contact details of provider:|| Postal: c/o FORMAT, 5th Floor, Muthaiga Mini Market, Limuru Road, P.O. Box 79 - 00621 Village Market, Nairobi, Kenya|
Phone: 254 20 6752866
Web page: http://www.aaae-africa.org
More information through EDIRC
Web page: http://www.aeasa.org.za/
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.:
- António Afonso & Mariana Santos, 2005. "Students and Teachers: A DEA Approach to the Relative Efficiency of Portuguese Public Universities," Working Papers Department of Economics 2005/07, ISEG - School of Economics and Management, Department of Economics, University of Lisbon.
- Emili Tortosa Ausina & Diego Prior & María Teresa Balaguer-Coll, 2004.
"On The Determinants Of Local Government Performance: A Two-Stage Nonparametric Approach,"
Working Papers. Serie EC
2004-04, Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie).
- Balaguer-Coll, Maria Teresa & Prior, Diego & Tortosa-Ausina, Emili, 2007. "On the determinants of local government performance: A two-stage nonparametric approach," European Economic Review, Elsevier, vol. 51(2), pages 425-451, February.
- R. D. Banker & A. Charnes & W. W. Cooper, 1984. "Some Models for Estimating Technical and Scale Inefficiencies in Data Envelopment Analysis," Management Science, INFORMS, vol. 30(9), pages 1078-1092, September.
- Torres, Marcelo & Morrison Paul, Catherine J., 2006. "Driving forces for consolidation or fragmentation of the US water utility industry: A cost function approach with endogenous output," Journal of Urban Economics, Elsevier, vol. 59(1), pages 104-120, January.
- Erbetta, Fabrizio & Rappuoli, Luca, 2008. "Optimal scale in the Italian gas distribution industry using data envelopment analysis," Omega, Elsevier, vol. 36(2), pages 325-336, April.
When requesting a correction, please mention this item's handle: RePEc:ags:aaae10:95982. 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: (AgEcon Search)
If references are entirely missing, you can add them using this form.