Over the last few years concerns have increased about the energy mix in many countries. These concerns have been of greater magnitude for countries with a common energy regulation such as European Union (EU) member states. An important aspect to take into account when choosing a given energy mix...

Several bargaining solutions could fail to capture advantage from having sets closer to the same utopia point. If the whole frontier of the set is improved maintaining the same utopia point, these solutions outcome remains stagnant at the same point. We called this phenomena the stagnation...

We analyse overall cost efficiency in Spanish local governments during the crisis period (2008-2015). To this end, we first consider some of the most popular nonparametric methods to evaluate local government efficiency, data envelopment analysis and free disposal hull, as well as recent...