Shephard’s distance functions are widely used instruments for characterizing technology and for estimating efficiency in contemporary economic theory and practice. Recently, they have been generalized by the Luenberger shortage function, or Chambers-Chung-Färe directional distance function....

In the last decades transport activities persistently increased in the EU27 and were strongly coupled to growth in gross domestic product. Like most production processes, they are inevitably linked with the generation of environmentally hazardous by-products, such as CO<Subscript>2</Subscript> emissions. This leads to...</subscript>

Environmental regulation has become more and more important in policy making among the world economies. How has it affected productivity growth and hence economic growth? The answer to this question is either controversial or yet to be explored in many cases. The objective of this paper is to...