demography
The study of the size, composition, and distribution of human populations and the causes and consequences of changes in these characteristics
population change
An increase or decrease in the size of a population. It is equal to (births +immigration)- (deaths+emigration)
birth rate
see crude birth rate
crude birth rate
annual number of live birth per 1,000 people in the population of a geographic area at the midpoint of a given year
death rate
see crude death rate
crude death rate
annual number of deaths per 1,000 people in the population of a geographic area at the midpoint of a given year
doubling time
the time it takes (usually in years) for the quantity of something growing exponentially to double. It can be calculated by dividing the annual percentage growth rate into 70
rule of 70
Doubling time (in years) = 70/ (percentage growth rate)
fertility
the number of births that occur to an individual woman or in a population
replacement-level fertility
number of children a couple must have to replace them. The average for a country or the world usually is slightly higher than 2 children per couple (2.1 in the U.S. and 2.5 in some developing countries) bc some children die before reaching their reproductive years
total fertility rate
TFR
Estimate of the average number of children who will be born alive to a woman during her lifetime if she passes through all her childbearing years (ages 15-44) conforming to age-specific fertility rates of a given year.
In simpler terms, it is an estimate of the average number of children a woman will have during her childbearing years`
life expectancy
average number of years a newborn infant can be expected to live
infant mortality rate
number of babies out of every 1,000 born each year that die before their first bday
age structure
percentage of the population (or number of people of each sex) at each age level in a population
demographic transition
Hypothesis that countries, as they become industrialized, have declines in death rates followed in birth rates
preindustrial stage
First stage
little population growth because of harsh living conditions lead to both a high birth rate and a high death rate
transitional stage
Second stage
when industrialization begins, food production rises, and health care improves. Death rates drop and birth rates remain high, so the population grows rapidly
industrial stage
Third stage
the birth rate drops and eventually approaches the death rate as industrialization, medical advances, and modernization becomes widespread. Pop. growth continues, but at a slower and perhaps a fluctuating rate, depending on economic conditions
Most developed and developing countries are in this stage
postindustrial stage
Fourth stage
the birth rate declines further, equaling the death rate and reaching zero population growth. Then the birth rate falls below the death rate and population size decreases
family planning
providing information, clinical services, and contraceptives to help people choose the number and spacing of children they want to have
What are the reasons Thailand had success reducing its growth rate in 15 years?
Explain the two types of fertility rates affecting a country’s population size and growth rate
List the 10 factors that affect a country’s average birth rate and total fertility rate
What are the two useful indicators of overall health of people in a country or region?
- infant mortality rate