Demographic trends and ageing in Europe. Prospects, problems and policies.
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"For populations and families the problem of ageing is a dual one: (a) the intensity, which determines enormous imbalances among the different age groups, as well as morphological ¿deformations', which will be felt far into the future; (b) the speed of demographic change, which would appear to be the most important aspect in that it implies prompt and complex parallel socio-economic and psychological cultural adjustments. The question that needs to be posed is whether present and future population trends in Europe and in some European countries will generate desirable and sustainable demographic paths." (EXCERPT)
[1] Joel E. Cohen,et al. How Many People Can the Earth Support , 1998 .