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The Demography of the World Population from 1950 to 2100. Data source: United Nations — World Population Prospects 2017. Demography (from Ancient Greek δῆμος (dêmos) 'people, society' and -γραφία (-graphía) 'writing, drawing, description') [1] is the statistical study of human populations: their size, composition (e.g., ethnic group, age), and how they change through the ...
Historical demography is the quantitative study of human population in the past. It is concerned with population size, with the three basic components of population change ( fertility , mortality , and migration ), and with population characteristics related to those components, such as marriage, socioeconomic status , and the configuration of ...
Population geography involves demography in a geographical perspective. [ a ] It focuses on the characteristics of population distributions that change in a spatial context. This often involves factors such as where population is found and how the size and composition of these population is regulated by the demographic processes of fertility ...
In 2021 he published “Advanced Introduction to Demography” in which he summarizes the foundations and applications of multi-dimensional demography – a field pioneered by Lutz – which captures population dynamics not only by the conventional age and sex structures, but also by other demographic dimensions such as educational attainment ...
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. Historical demographers must make do with estimates, models and extrapolations. For the demographic methodology, see historical demography.
Population growth rate (2023, Our World in Data) [1] Absolute increase in global human population per year [2]. Population growth is the increase in the number of people in a population or dispersed group.
In ecology, a population is a group of organisms of the same species which inhabit the same geographical area and are capable of interbreeding. [2] [3] The area of a sexual population is the area where interbreeding is possible between any opposite-sex pair within the area and more probable than cross-breeding with individuals from other areas.
Wrigley's scholarly works focus on demographic history, and the long-term causes and effects of urbanization and industrialization. Among his many publications, Wrigley is known for the book Continuity, Chance and Change, published in 1988, in which he explained why Malthus was wrong about the law of diminishing returns slowing population growth.