Than demographic

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Than demographic - periodic decline in the number of births due to the action of a random factor such as war, famine, etc. Marriages are less often concluded, and the decision to have a baby is postponed for a more favorable time. As a result, the number of generations born during this random factor is significantly lower than other age groups. In the pyramid of the sex and the age of the lower generations are marked in the form of a reed. The succession of the lower generations in reproductive age is more than demographic, since few generations of parents also have few descendants. It occurs alternately with demographics. On the other hand, the long-term low birth rate is related to a specific phase of demographic development and results from the effects of systemic factors.

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