An introduction to the DTM

1. Changing populations and
places
1. Population Terms & Tools

2. Syllabus link
Population change and demographic transition
over time, including
• natural increase
• fertility rate
• life expectancy
• population structure
• dependency ratios

3. YEAR
Millions of people
6000
0
3000
4000
5000
2000
1000
20001100
Slow growth
1650
Increase in growth
1820
1930
EXPLOSION
1960
1974
1987
Population Explosion?

4. Tool 2:
The Demographic Transition Model
Demography: The study of population
Transition: Change
DTM: A model used to describe, explain and
analyze population change over time

5. Populations change as result of variations in the BR and DR,
plus/minus migration. The DEMOGRAPHIC TRANSITION MODEL
describes how BR and DR change over time.
.
Population change over time

6. Population Change in China

16. The DTM & population pyramids