Demography Flashcards
The scientific study of human populations.
Demography
o Population size
o Population structure/composition
o Population distribution in space
demography
population size is affected by:
- Natality
- Mortality
- Migration
2 Methods of Population Allocation:
- de facto method
- de jure method
people are counted or allocated to the area where they were physically present at the time of the census.
de facto method
people are counted or
allocated to the place of their usual residence.
de jure method
Determines the number of percentages of the population according to the categories of
important socio-demographic-economic variables.
population composition
Factors Affecting Population Composition
- birth rate
- death rate
- emigration
- immigration
indicator of age-induced
economic drain on human resources.
age dependency ratio
2 age groups of dependents:
Children (0-14yo).
Elderly (≥65yo)
economically active group
15-64 yrs
: computed by dividing the number of males by the number of females using a factor of 100.
sex ratio
Interpreted as the number of males for every 100 females in the population.
sex ratio
Graphical presentation of the age and sex structure of a population.
The population Pyramid
- male population is shown at the left and females at the right.
- The youngest age group is the base and the oldest is the top.
Special type of histogram