Sustainability | Free Full-Text | Assessment of Energy Efficiency in the European Union Countries in 2013 and 2020
In the face of the current energy crisis and the need to implement the objectives of climate and energy policy, it seems necessary to examine energy efficiency. Accordingly, this article aims to assess the energy efficiency of European Union (EU) countries. The assessment is performed using data envelopment analysis (DEA), a non-parametric method of measurement of relative efficiency. Ireland recorded the highest energy efficiency both in 2013 and 2020. The average efficiency of all countries assessed was lower in 2020 than in 2013. The number of fully efficient countries had decreased in 2020...