The European welfare regimes face two sets of challenges. One internal, specific for the welfare state itself, and the other external, imposed by changing economic, political and economics conditions. The first challenge lies in the growing gap between the rigid welfare state design and flexible...

This paper investigates the fractal behaviour of the electric spot prices traded in some European markets. Whereas the analysis leads to exclude the presence of multifractality, we provide evidence supporting the conclusion that the multifractional Brownian motion can represent a good candidate...