Population aging is a consequent result of demographic transition due to fertility and mortality declining one after the other.The completing of demographic transition presents not only the declining of fertility and mortality, but also the increasing of population age structure.However, demographic transition does not occur simultaneously with population aging.Demographic transition occurs when mortality starts to decline, while population age occurs when fertility starts to decline.Because of the "time lag" between fertility and mortality decline, the appearance of population aging is always later than demographic transition.The effects of demographic transition on population aging are quite different at various stages.
基金项目:
作者简介:
罗淳(1956-),男,云南人,云南大学人口研究所教授,法学博士。
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