In the literature on environmental innovations R&D collaborations have been identified as a critical determinant of a firm's environmental innovation performance. However, the literature suggests that R&D collaboration is not always beneficial. Therefore, a more elaborated analysis of the...

Since the 1990s, efficiency and benchmarking analysis has increasingly been used in network utilities research and regulation. A recurrent concern is the effect of environmental factors that are beyond the influence of firms (observable heterogeneity) and factors that are not identifiable...

It is often contended that there is a sharp conflict between the economist's and the ecologist's approach to the question of sustainability. This paper takes the opposite view. The paper attempts to show that both views can be formulated in a common analytical framework and that carried to its...