Maier W
Geburtshilfe Frauenheilkd. 1980 Jan;40(1):47-50. doi: 10.1055/s-2008-1037020.
A prominent feature of a stable population is the stability of the age structure. The present investigation demonstrates that in the Federal Republic of Germany age distribution of youth, working population and old age pensioners remained stable during the last hundred years despite fluctations in the birth rate, death rate, and life expectancy. It can be concluded that an increasing life expectancy must lead to overpopulation which will in turn reduce the birth rate and slow down human reproduction.
稳定人口的一个显著特征是年龄结构的稳定性。本次调查表明，在德意志联邦共和国，尽管出生率、死亡率和预期寿命有所波动，但在过去的一百年里，青年、劳动人口和老年养老金领取者的年龄分布保持稳定。可以得出结论，预期寿命的增加必然导致人口过剩，而这反过来又会降低出生率并减缓人类繁殖。
