This paper is a summary of some of the considerations involved in applying an existing model to a new problem, in particular in deciding whether to update or not, and some of the issues involved in interpreting the output from the new application. Thus where you start from does influence where...

L’élevage ovin est une activité traditionnelle dans toutes les régions de la Tunisie et surtout le Centre et le Sud. Sur le plan national et jusqu'à une date récente seule la viande bovine retenait l'attention des pouvoirs publics et les opérateurs privés. Face aux enjeux actuels de...

The objective of this paper is to propose an alternative measure of irrigation water efficiency based on the concept of input- specific technical efficiency, which contracts with measures previously used in the literature. The proposed methodology is applied to a randomly selected sample of 144...