why does population grow faster in some places than in others
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Demographic Transition Model

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Why does population grow faster in some places than in others?. Demographic Transition Model. Demographic: Think population Transition: Think change In order to understand this concept, you must be comfortable with this vocabulary: CBR, CDR, NIR , Infant mortality, revolution.

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slide2

Demographic: Think population

  • Transition: Think change
  • In order to understand this concept, you must be comfortable with this vocabulary:
    • CBR, CDR, NIR, Infant mortality, revolution
slide4

All places have seen changes in natural increase, fertility, and mortality rates

  • These occur at different times in different parts of the world
  • The DTM has four stages of population growth
    • No country today is Stage 1.
    • LDCs are in Stages 2 and 3
    • MDCs are in Stage 4
stage one low growth
STAGE ONE: LOW GROWTH
  • Early human societies to about 1750.
  • Birth rates and death rates were roughly equal
  • Infant mortality was high
  • Since CBR and CDR were about the same, natural increase was low
stage one
STAGE ONE
  • Population grew toward the end of Stage One because of the AGRICULTURAL REVOLUTION, when humans used agriculture for the first time.
stage two high growth
STAGE TWO: HIGH GROWTH
  • CDR drops dramatically
  • CBR remains about the same
  • Since CBR > CDR, population grows
causes of stage two
CAUSES OF STAGE TWO
  • Industrial Revolution
    • Europe, U.S., Canada
  • Being able to make products quickly led to greater wealth—being able to ensure supplies of food.
  • 1750s-1800s
  • Medical Revolution
    • Africa, Asia, Latin America
  • Improved medical practices in Europe diffused to Africa, Asia, and Latin America
  • This cut down on tradition forms of death from disease
  • Mid 1900s
stage three moderate growth
STAGE THREE: MODERATE GROWTH
  • A country is in Stage 3 when the CBR and TFR start to drop rapidly.
  • The drop is a result of social customs, not technological changes.
  • People in Stage 3 countries are likely to live in cities and no longer need large families.
stage four low growth
STAGE FOUR: LOW GROWTH
  • Stage 4 countries have CBRs that are nearly equal to CDRs.
  • NIR drops to near zero, a condition called ZERO POPULATION GROWTH (ZPG).
  • ZPG means that the TFR is around 2.1, the replacement rate
why do countries reach stage four
WHY DO COUNTRIES REACH STAGE FOUR?
  • Women’s education and work
    • Fewer children for working women
    • First children are born later in life (after college), leaving less time to produce more.
reasons for stage 4
REASONS FOR STAGE 4
  • Birth control and Family Planning
    • Use of contraceptives—including condoms and “the pill” help prevent pregnancy
  • More money and free time=attending events without children
    • Travel overseas
    • Attending plays and shows
    • Dining at restaurants
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