Professionalisation has been a process which has profoundly influenced the societies of the most industrialised countries, since it entails a high position in the occupational hierarchy for its members. This has marked effects on the occupational choices of individuals, because the social...

We analyze the effect of human capital obsolescence due to the introduction of technological innovations on the long-run growth rate, and show that in equilibrium the pace of technical change may be faster than is socially optimal. In such cases, the existence of market imperfections, and their...

A general equilibrium model is proposed which assumes that firms hire both official and unregistered workers as imperfect substitutes, that entrepreneurs differ in their ability to increase the efficiency of official labour, and that this ability is due to heterogeneous original ability and to...