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Demography is the statistical study of human populations. Demographers use census data, surveys, and statistical models to analyze the size, movement, and structure of populations. "Demographic" Definition: What Does "Demographic" Mean? The term "demographic" encapsulates the study and categorization of human populations based on distinct traits . 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 interplay of fertility (births), mortality (deaths), and migration. [2] Demographic analysis examines and ... DEMOGRAPHIC definition: 1. relating to demography (= the study of populations and the different groups that make them up…. Learn more.