Population - distribution and structure
World population density
Mexico population distribution
Why is population distributed unevenly?
World Population & Income 1988
World food production
In addition to geographic distribution . . . Demographers also display the structural variation within particular subgroups of a population.
Population pyramids
Population pyramids show a composite of the age and sex of a given population.
Population projections
Population dynamics and processes
How do people enter and leave a given population?
Births and Deaths
Fertility
Total fertility rate (TFR) is the average number of children a woman will have between 15-49 years old.
Natural Increase
Births - deaths = natural increase
Doubling Time
Use the "rule of 72" for calculating doubling time
from the rate of natural increase.
Divide 72 by the rate of natural increase to get the number of
years it will take for a given population to double. For example,
if you want to know how long it will take to double a given population
at a four percent rate of natural increase, divide 4 into 72 and
get 18 years.
Life expectancy:
The average number of years an infant newborn is expected to live.
Infant mortality
Access to drinking water.
Over 65 year olds
Dependency ratio:
measure of the impact of the young and old on the more economically
productive members of the population
Economically active men and women over 60. In some parts of the world, men and women must continue working as senior citizens.
Discussion:
Why do parents choose to have children?
womens status
family name/bloodline
religious issues
lifestyle/cultural traits
cultural expectations
accident
household economics
child labor
elderly support (social security)
infant mortality
lack of education
personal fulfillment
last rites
marital status
access to contraception
warfare
nationalism
gender selection
government intervention
etc.
Examples of geographic context:
Urban: lack of space - apartment rents are expensive, education and waged work are often available for women. | Rural: kids perform chores, lots of space means cheaper rent, traditional culture: women often don't have waged work. |
More developed countries (MDC) educated workers needed to work in high-tech | Less developed countries (LDC) high infant mortality and no formal system of social security encourage large families so parents have someone to take care of them in their old age. Status of women is often low. |