Piot-Lepetit, Isabelle; Brümmer, Bernhard; Kleinhanss, … - In: Économie rurale 268 (2002) 1, pp. 119-129
[eng] This paper develops a methodology dealing with desirable and undesirable output asymmetrically which is used to evaluate the impact of agri-environmental policy, both in France and Germany, on the technical and environmental efficiency of arable farms with a nitrogen surplus. Results...