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The Demographic Transition Model *hereafter referred to as the DTM
STAGE ONE Population Pyramid Shape Wide bottom, wide top ExampleNone in existence Birth Rate High Death Rate Natural Increase Slow
STAGE ONE Reasons for change in birth rate Children needed to farmHigh Infant Mortality Rate Religious/Social Encouragement Little Family Planning
STAGE ONE Reasons for change in death rate Disease FamineLittle medical access
STAGE TWO Population Pyramid Shape Wide base, narrow top Example3rd World Birth Rate High Death Rate Rapid Decrease Natural Increase Rapid Increase
STAGE TWO Reasons for change in birth rate Children needed to farmHigh Infant Mortality Rate Religious/Social Encouragement Little Family Planning
STAGE TWO Reasons for change in death rate Improved medical careSafe/constant water supply Improved sanitation Fewer children die
STAGE THREE Population Pyramid Shape Equilateral triangle ExampleBrazil, Mexico, India Birth Rate Slowly Falling Death Rate Levels Off Natural Increase Slower Increase
STAGE THREE Reasons for change in birth rate Improved medical careImproved diet Less children needed to work Improved economy
STAGE THREE Reasons for change in death rate Improved medical careSafe/constant water supply Improved sanitation Fewer children die
STAGE FOUR Population Pyramid Shape coffin ExampleUSA, Western Europe, Japan Birth Rate Low Death Rate Natural Increase Stable,Slow
STAGE FOUR Reasons for change in birth rate Family PlanningImproved Women’s Status Late Marriage
STAGE FOUR Reasons for change in death rate Excellent Health CareExcellent Food Supply
STAGE FIVE Population Shrinks Postindustrialized
Demographic Transition Model.
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The Demographic Transition Model
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The Demographic Transition Model (DTM)
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