Demographic transition is a model used to represent the movement of high birth and death rates to low birth and death rates as a country develops from a pre-industrial to an industrialized economic system. It works on the premise that birth and death rates are connected to and correlate with stages of industrial development. The demographic transition model is sometimes referred to as "DTM" and is based on historical data and trends.
Explanation:Demographic transition involves four stages.
Stage 1: Death rates and birth rates are high and are roughly in balance, a common condition of a pre-industrial society. Population growth is very slow, influenced in part by the availability of food. The U.S. was said to be in Stage 1 in the 19th century.
Stage 2: This is the "developing country" phase. Death rates drop rapidly due to improvements in food supply and sanitation, which increases life spans and reduces disease. Without a corresponding fall in birth rates, countries in this stage experience a large increase in population.
Stage 3: Birth rates fall due to access to contraception, increases in wages, urbanization, an increase in the status and education of women, and other social changes. Population growth begins to level off. Mexico is believed to be in this stage in the early decades of the millennium. Northern Europe entered this stage in the later part of the 19th century.
Stage 4: Birth rates and death rates are both low in this stage. People born during Stage 2 are now beginning to age and require the support of a dwindling working population. Birth rates may drop below replacement level, considered to be two children per family. This leads to a shrinking population. Death rates may remain consistently low, or they may increase slightly due to increases in lifestyle diseases linked to low exercise levels and high obesity. Sweden has reached this stage in the 21st century.
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Demographic transition is a model used to represent the movement of high birth and death rates to low birth and death rates as a country develops from a pre-industrial to an industrialized economic system. It works on the premise that birth and death rates are connected to and correlate with stages of industrial development. The demographic transition model is sometimes referred to as "DTM" and is based on historical data and trends.
Explanation:Demographic transition involves four stages.
Stage 1: Death rates and birth rates are high and are roughly in balance, a common condition of a pre-industrial society. Population growth is very slow, influenced in part by the availability of food. The U.S. was said to be in Stage 1 in the 19th century.
Stage 2: This is the "developing country" phase. Death rates drop rapidly due to improvements in food supply and sanitation, which increases life spans and reduces disease. Without a corresponding fall in birth rates, countries in this stage experience a large increase in population.
Stage 3: Birth rates fall due to access to contraception, increases in wages, urbanization, an increase in the status and education of women, and other social changes. Population growth begins to level off. Mexico is believed to be in this stage in the early decades of the millennium. Northern Europe entered this stage in the later part of the 19th century.
Stage 4: Birth rates and death rates are both low in this stage. People born during Stage 2 are now beginning to age and require the support of a dwindling working population. Birth rates may drop below replacement level, considered to be two children per family. This leads to a shrinking population. Death rates may remain consistently low, or they may increase slightly due to increases in lifestyle diseases linked to low exercise levels and high obesity. Sweden has reached this stage in the 21st century.
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