demographic transition

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demographic transition

a theory of demography which states that, as a nation industrializes, it goes through a series of populational changes, starting with a decline in infant and adult mortality and followed later by a reduction in birth rate. The time lag between the decline in deaths and births produces a rapid population growth in ‘developing’ nations. In ‘developed’ nations births and deaths become approximately equal, giving a stable population structure.
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A companion to the demographic transition model, termed the health or epidemiological transition, describes long-term shifts in mortality from "pestilence and famines" to "degenerative and human-made diseases" (Young and Bjerregaard, 2008:15).
At the same time, the demographic transition model effectively shifted attention away from the question of relations of ruling between developed and developing world.
The aim of the paper was to observe how population pyramids of the world's countries corresponds to the main pyramids' shapes, which are usually related to the "Demographic Transition Model".

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