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age structure
Percentage of the population (or number of people of each sex) at each age level in a population.
affluence
abundance; wealth
birth rate
the number of births in a population in a certain amount of time
death rate
The number of deaths in a population in a certain amount of time
Demography
The scientific study of population characteristics.
demographic transition
change in a population from high birth and death rates to low birth and death rates
characteristics of developing and developed countries
Low Per Capita Income. High Levels of Poverty. Dependence on Agriculture. Rapid Population Growth. Weak Infrastructure. Health Challenges. Limited Human Capital.
doubling time formula
70/growth rate %
emigration
movement of individuals out of an area
family planning
the practice of regulating the number or spacing of offspring through the use of birth control
fertility rate
the average number of children a woman of childbearing years would have in her lifetime, if she had children at the current rate for her country
immigration
Movement of individuals into a population
life expectancy
A figure indicating how long, on average, a person may be expected to live
migration
A movement from one country or region to another
population change
(births + immigration) - (deaths + emigration)
replacement-level fertility
the total fertility rate required to offset the average number of deaths in a population in order to maintain the current population size
total fertility rate (TFR)
The average number of children a woman will have throughout her childbearing years.
infant mortality rate
the number of infant deaths per 1,000 live births
Note 
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