The Dtm
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The Dtm






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The Dtm The Dtm Presentation Transcript

  • Introduction
    • In this amazing presentation I will cover:
    • Links between the DTM and age structure.
    • The usefulness of the DTM.
    • Finally, relating the DTM to LEDCs/MEDCs.
  • What is the DTM?
    • The DTM describes how the population of a country changes over time. It gives changes in birth and death rates, and shows that countries pass through 5 stages of population change.
  • The DTM
  • Links between the DTM and age structure (population pyramids)
    • The DTM can be used as a vehicle to demonstrate changes in population and can be incorporated into a pyramid to identify which stage a country is in or a pyramid can be used to identify which stage a country is in.
  • Por ejemplo
    • The pyramid indicates that Sudan has a high birth rate and a short life expectancy. This shows that Sudan is in stage one of the DTM because it falls into the stage one criteria.
  • The usefulness of the DTM
    • The DTM is useful because:
    • It is universal – it can be applied to all countries.
    • It provides a starting point for the study of demographic change over time.
    • The timescales are flexible.
    • It is easy to understand.
    • It enables comparisons to be made between the countries.
  • Relating the DTM to LEDCs/MEDCs.
    • In MEDCs:
    • Most MEDCs have passed through all of the stages.
    • At Stage 4 ny about the 1960s.
    • Some now moving to stage 5.
    • Took about 200 yrs to move through the stages.
    • Growth rates rarely exceeded 1% per year.
    • Economic growth led the transition.
  • Examples
    • Italy and Germany are in stage 5 – a population decline, where death rate has over took birth rate.
    • USA, Japan, France and the UK are in stage 4 – where birth and death rate are low however the birth rate is higher than the death rate.
    • Reasons for stages 4 and 5:
    • Birth rate - Family planning, good health, improving status of women, later marriages.
    • Death rate – Good health care. Reliable food supply.
  • Relating DTM to LEDCs/ MEDCs continued.
    • In LEDCs:
    • Not yet passed through all stages.
    • Many entered Stage 2 in mid 20 th century.
    • Many still in Stages 2 or 3.
    • Huge gap between birth and death rates – high population growth.
    • Population increase exceeds 4% per yr in some countries and 2% in others.
    • Moving through stages more rapidly.
    • Driven more by government policies and western medical aid.
    • Economic development lagging behind.
  • Examples
    • Egypt, Kenya – Stage 2 – High birth rate, lower death rate – rapid population growth.
    • Brazil, India and China – Stage 3- Falling birth and death rate, increase slows down.
    • Reasons for stage 2: Birth rate – Child labour, no family planning.
    • Reasons for stage 2 and 3: Birth rate – Improved medical care and diet. Fewer children needed. Death rate – Improvements in medical care. Water supply and sanitation, fewer children dying.
  • Summary
    • You hopefully should be able to know:
    • Links between the DTM and age structure.
    • The usefulness of the DTM.
    • Finally, relating the DTM to LEDCs/MEDCs.
  • “ Very Nice! Any Questions?