notes on each stages of the DTM model

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demographic transition model

stage one: the most undeveloped countrys, (e.g. )

there is high birth and death rates, so in balance.

stage two: death rates drop rapidly cause the country is developing.

with a slight fall in birth rate as well, but overall, the population grows.

stage three: due to access to contraception, birth rates go down, and both death and birth rates level off.

stage four: both low birth rates and low death rates.

stage five(?): some theorists consider that a fifth stage is needed to represent countries that have sub-replacement fertility (that is, below 2.1 children per woman).

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