According to many empirical studies, the size of the black market is growing in the OECD countries. Among the reasons for such a phenomena, is the labor market structure (mainly high total labor costs and the reduction in working hours in the official economy). The supply side of the labor...

Even if its roots are much older, random sets theory has been considered as an academic area, part of stochastic geometry, since Matheron [7]. Random sets theory was first applied in some fields related to engineering sciences like geology, image analysis and expert systems (see Goutsias et al....