Demography: is the statistical
study of human population
Underpopulation: when an increase in
population causes an increase in the
average income per head
Overpopulation: when an increase in
population causes a decrease in the
average income per head
Optimum Population: is when the average
income per head is at its highest possible level
Trends in Births and Deaths
Birth Rate: is the average
number of live births per
1,000 people per year
Fertility Rate: is the number
of live births in a geographic
area in a year per 1,000
woman of childbearing age
Total Fertility Rate: is the average
number of babies born to women
during their reproductive years
Death Rate: is the average
number of deaths per 1,000
people per year
Infant Mortality: refers to the
number of children out of every
1,000 born alive who die on or
before their first birthday
Life Expectancy: is the number of years, based on statistical
averages, that a given person of a specific age, class or other
demographic variable may be expected to live
Density of Population is the
average number of people per
square kilometre
Migration
Net Migration is the difference
between emigration and
immigration during a period of time
Push Forces
Low Wage Rates
High Levels of Unemployment
Lack of Opportunities
Religious persecution
Pull Forces
Employment opportunities
Higher Wages
Better Standard of Living
A more attractive climate
Economic Consequences
of an Increase in
Emigration
Higher Dependency Ratio
'Brain Drain'
Unemployment reduced
Demand for state services fall
Economic Consequences for
a Country Experiencing
Increased Immigration
Positive
Improved Dependency Ratio
Gov. Revenue increases
Increased demand for
goods and services
Negative
Drain on state finances
Exploitation of immigrants
Pressure on provision
of state services
The Census
It is the official count of the nation's people and a
compilation of economic, social and other data, used by the
government in the formulation of development policies
and plans. It occurs every four years
Economic uses of
a Census
Demographic Changes
Pension
planning
Infrastructural requirements
Future levels of consumer demand
Regional policy
An ageing population is living
longer, has an average life
span that is increasing and
has a growing percentage of
the population who are in an
older age bracket