A distinctive feature of unemployment is that its incidence is far from being homogeneously distributed in the territory. Disparities in unemployment rates are not only observed between countries but also between regions within countries. The available evidence indicates that since the early 80s...

R.G. Goodwin mentioned that "economists will be led, as natural scientists have been led, to seek in nonlinearities an explanation of the maintenance of oscillation" (Goodwin, Econometrica 19(1), 1951); following this reasoning, we studied business cycles as if they were generated by nonlinear...