Purpose - The purpose of this study is to analyze the environmental efficiency level and trend of the transportation …-frontier slack-based measure (SBM) approach to evaluate environmental efficiency, which targets and classifies specific regions into … regional groups. First, this study employs the SBM with the undesirable outputs to construct the environmental efficiency …

-up" the UK economy. We use data envelopment analysis (DEA) methods to calculate regional economic and environmental efficiency … achieve than environmental efficiency improvements, requiring stronger policy support for the latter. The high inertia of …

' environmental efficiency? And which pillars of institutional quality improve countries' environmental efficiency? Design … considered as the bad output and the GDP is referred as the desirable one, the work computes the environmental efficiency into …' performance, the findings confirm that high and upper middle-income countries have higher environmental efficiency compared to low …