"The experience of decline in real wages of the unskilled workers during the 1980s in the United States, and the increase instead in their unemployment in Europe (due to the comparative inflexibility of their labour markets vis-a-vis those of the United States)1 , has prompted a search for possible explanations. This search has become more acute with the evidence that the adverse trend for the unskilled has not been mitigated during the 1990s to date.