Demography is the statistical and mathematical study of the size, composition, and spatial distribution of human populations and how these features change over time More technology, education (especially for women), and economic development Data are obtained from a census of the population and from registries
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Records of events like birth, deaths, migrations, marriages, divorces, diseases, and employment
Demographic statistics are measures of the characteristics of, or changes to, a population
Records of births, deaths, marriages, immigration and emigration and a regular census of population provide information that is key to making sound decisions about national policy [1][2] a useful summary of such data is the population pyramid. Earth has a human population of over 8.2 billion as of 2025, with an overall population density of 50 people per km 2 (130 per sq Nearly 60% of the world's population lives in asia, with more than 2.8 billion in the countries of india and china combined.
Demographics of the united states The united states is the most populous country in the americas and the western hemisphere, with a projected population of 342,034,432 on july 1, 2025, according to the u.s [1] with about 4% of the world's population, it is the third most populous country. Demographic profile a demographic profile is a form of demographic analysis in which information is gathered about a group to better understand the group's composition or behaviors for the purpose of providing more relevant services
In business, a demographic profile is usually used to increase marketing efficiency.
Demographic history is the reconstructed record of human population in the past Given the lack of population records prior to the 1950s, there are many gaps in our record of demographic history. Demographic transition[a] is a phenomenon and theory in the social sciences (especially demography) referring to the historical shift from high to low rates of birth and death, as societies attain several attributes
