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Demography

In: Social Issues

Submitted By daisym
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Demography is the statistical study of human populations. It can be a very general science that can be applied to any kind of dynamic living population, i.e., one that changes over time or space (see population dynamics). It encompasses the study of the size, structure, and distribution of these populations, and spatial and/or temporal changes in them in response to birth, migration, aging, and death.
“Demo-” from Ancient Greek δῆμος dēmos, means “the people” and “-graphy” from γράφω graphō, means “measurement.”[1]
Demographic analysis can be applied to whole societies or to groups defined by criteria such as education, nationality, religion and ethnicity. Institutionally, demography is usually considered a field of sociology, though there are a number of independent demography departments.[2] Formal demography limits its object of study to the measurement of populations processes, while the broader field of social demography population studies also analyze the relationships between economic, social, cultural and biological processes influencing a population.[3]
The term demographics refers to characteristics of a population.
Contents
* 1 Methods * 1.1 Direct methods * 1.2 Indirect methods * 2 Common Rates and Ratios * 3 Basic equation * 4 History * 4.1 Science of population * 5 See also * 6 Notes * 7 Further reading * 8 External links
Methods
There are two types of data collection — direct and indirect — with several different methods of each type.
Direct methods
Direct data come from vital statistics registries that track all births and deaths as well as certain changes in legal status such as marriage, divorce, and migration (registration of place of residence). In developed countries with good registration systems (such as the United States and much of Europe), registry statistics are the best method...

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