In this article, a unique data set for Danish manufacturing firms has been used to analyse the interplay between export, R&D investments and productivity. In addition to traditional tests, a nonparametric test for differences in stochastic distributions gives evidence that the productivity...

In an environmental economics context increasing marginal damage costs are usually assumed, and a methodology for calculating a sustainability index in accordance with this assumption is presented. The aggregate index is constructed from an n-element vector including the values of the (n) subset...