In this paper we present a new approach to evaluate the environmental efficiency of decision making units. We propose a model that describes a two-stage process consisting of a production and an end-of-pipe abatement stage with the environmental efficiency being determined by the efficiency of...

In this paper we propose a stochastic formulation of the materials balance condition which imposes physical constraints on production technologies. The estimation of the model involves a composed error term structure that is commonly applied in the literature on stochastic frontier analysis of...

This study provides evidence on the existence of a negative Greenium, i.e. a risk premium linked to firms' greenness and environmental transparency, based on European individual stock returns. We define a priced ‘greenness and transparency' factor based on companies' greenhouse gas emissions...