Data Enveloment Analysis

A conditional directional distance function approach for measuring regional environmental efficiency: Evidence from the UK regions. MPRA Paper 38147. University Library of Munich, Germany. April 2012.

This paper, by using conditional directional distance functions as introduced by Simar and Vanhems [J. Econometrics 166 (2012) 342-354] modifies the model by Färe and Grosskopf [Eur. J. Operat. Res. 157 (2004) 242-245], examines the link between regional environmental efficiency and economic growth. The proposed model using conditional directional distance functions incorporates the effect of regional economic growth on regions’ environmental efficiency levels.