Demography, << dih MOG ruh fee, >> is the study of human populations. Demographers (population experts) study such characteristics as age, number, distribution, and sex of people in an area. This information comes from a population census or national sample survey. Most nations conduct censuses, usually once every 10 years. Demographers also study population change, which is the result of births, deaths, movement of people, and changes in population characteristics.
People in government, business, and other fields use demographic methods to study aspects of a society or economy. Businesses want to know such demographics (demographic data) as the age, sex, income level, life style, location, and consumer habits of people in potential markets for their products.
