Q.Define demography. Explain its scope.

Demography is one of the foundational tools economists use to understand how a population's size and structure affect the economy.

Its scope has two closely linked branches: formal/quantitative demography, which statistically measures population size, growth, density, and vital rates; and population studies, which analyses the social and economic causes and consequences of demographic change.

Demography, from the Greek demos (people) and graphein (to write), is the systematic and scientific study of human populations — their size, structure, distribution, and the way these characteristics change over time through births, deaths, and migration.

The scope of demography is generally understood in two parts. Formal or quantitative demography deals with the statistical measurement of population variables: total population size, growth rate, density, age-sex composition, birth and death rates, and life expectancy. Population studies (social demography) goes further, examining the social, economic, and policy causes and consequences of population change — for instance, how rising literacy or urbanisation affects birth rates, or how a growing working-age population affects employment and savings.

For economics, demography is important because population functions as both the labour force that produces goods and services and the market that consumes them. Governments rely on demographic data, primarily from the Census of India, to plan schools, hospitals, housing, and employment programmes, and to design policies for Human Resource Development. This is why the TS Inter II year Economics syllabus opens the unit on population with the meaning and scope of demography before moving to specific measures like vital rates and the Human Development Index.

Students often reduce demography to mere population counting; the scope equally includes the analysis of causes and consequences of demographic change (population studies), which is frequently left out.