Formal demography is the study of human populations at any given time with respect to the size, distribution and structure of the population. Formal demography also looks at changes that occur in the population over time, especially population growth. The greater or lesser occurrence of births, deaths and migrations are the basic causes of population growth. Thus, there is an interest in studying two types of demographic variables. A group of variables describes some characteristics of interest to the population. They refer to a specific geographic space and to a specific instant in time, therefore, they make up the static analysis of the population:
- Size of a population
- Statistical-demographic indicators
- Mortality measures
- Construction of mortality tables
- Population theory
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