[Children of immigration:  effects of their presence on the demographic situation in selected employment countries].
The author examines the impact of migrant workers in Europe on such demographic developments as declining fertility, population decrease, and demographic aging.  Official government and U.N. data are used to contrast age distributions of migrant and native populations in selected receiving countries in Europe.  "In his analysis of the impact of second-generation migrants on demographic development in the principal European employment countries, the author shows that in all of these countries the foreign population improves the age distribution of the population as a whole by way of reinforcing the weight of the younger age groups in relation to the older groups.  The ageing of the national populations...is thus countered by the presence of second-generation migrants."  (summary in ENG)