models most often found in the literature are demonstrated. Abatement activity in the form of end-of-pipe is added and an … introduced; desirable output efficiency, residuals efficiency and abatement efficiency. It is demonstrated that these measures … can be estimated independently using the DEA model. …

unintended residuals as functions of the same set of inputs. End-of-pipe abatement activity is introduced for a production unit … inefficiency, three efficiency measures are introduced: desirable output efficiency, residuals efficiency, and abatement efficiency …. All measures can be estimated separately using the non-parametric DEA model. …

exogenous environments. In this paper we compare three recently developed estimators, namely conditional DEA (Daraio and Simar …