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Performances And Efficiencies Of The Irrigation Water Users’ Associations In Tunisia

  • Frija, Aymen
  • Speelman, Stijn
  • Chebil, Ali
  • Buysse, Jeroen
  • Van Huylenbroeck, Guido

This article analyzes the efficiency of Water Users Associations (WUA) in the Cap Bon region (Tunisia) and studies its main determinants. The analysis is performed in two stages. First, the efficiency is measured via the nonparametric “Data Envelopment Analysis” (DEA) technique. The DEA models are constructed not only to assess the overall WUA efficiency but also to evaluate the management and engineering sub-vectors efficiencies separately through a mathematical modification in the initial DEA model. In a second stage critical determinants of efficiency are determined using a Tobit model. In this analysis the focus is on technical (characteristics of the irrigation area and network), organizational and administrative variables. Results show that on average 18.7% of the used inputs could be saved if the WUA would operate on the frontier. The average scale efficiency, which can be calculated as the ratio between Constant and Variable Returns to Scale efficiency measures was around 71%, indicating that many WUAs are not operating at an efficient scale. Subvectors efficiencies show that WUAs present better performances in maintenance activities than in management. The inefficiency found can furthermore be mainly attributed to the number of years of experience in operating a WUA in addition to the number of water pumping stations managed and the rate of the exploited area. The scale inefficiencies are mainly due to administrative and organizational variables.

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File URL: http://purl.umn.edu/6460
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Paper provided by European Association of Agricultural Economists in its series 107th Seminar, January 30-February 1, 2008, Sevilla, Spain with number 6460.

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Date of creation: 2008
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Handle: RePEc:ags:eaa107:6460
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  1. 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.
  2. 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).
  3. 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.
  4. Alfons Oude Lansink & Ky–sti Pietola, 2002. "Effciency and productivity of conventional and organic farms in Finland 1994--1997," European Review of Agricultural Economics, Foundation for the European Review of Agricultural Economics, vol. 29(1), pages 51-66, March.
  5. Darryl Holden, 2004. "Testing the Normality Assumption in the Tobit Model," Journal of Applied Statistics, Taylor & Francis Journals, vol. 31(5), pages 521-532.
  6. Knox, Anna & Meinzen-Dick, Ruth Suseela, 2000. "Collective action, property rights, and devolution of natural resource management: exchange of knowledge and implications for policy," CAPRi working papers 11, International Food Policy Research Institute (IFPRI).
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