Assessment of irrigation pricing policies: a data envelopment analysis approach

Resumen

The European Water Framework Directive encourages pricing policy reforms in order to protect theenvironmental quality of water and promote its efficient use. This paper deals with two aspects of efficiency,namely economic and environmental efficiency, analyzed for different pricing methods. Volumetric pricingmethods are compared with other indirect schemes (‘per area’, on ‘input’, on ‘output’ and ‘quota’) under threedifferent water saving scenarios. The Data Envelopment Analysis (DEA) technique is used to assess theeco-efficiency of an eventual water pricing reform in the irrigated agricultural system of Capitanata, in Italy.Overall, findings point out that a pricing system based on ‘per area’ and ‘output’ will lead to the highesteco-efficiency, although this is not valid under any water pricing charge. The enforcement of water saving viapricing does not imply a higher eco-efficiency, mainly in the case of environmental efficiency. The use of theDEA approach appears useful in the assessment of water pricing policies where conflictive economic andenvironmental goals arise. It provides a methodology to support policy makers in the design of water policypricing aimed at the enhancement of efficiency, both economic and environmental