: a loose pullover or jacket without a collar and usually with long sleeves. See words that rhyme with sweatshirt Spanish Central: Translation of sweatshirt Nglish: Translation of sweatshirt for Spanish speakers.
Demography (from prefix demo- from Ancient Greek Î´á¿Î¼Î¿Ï dÄmos meaning the people, and -graphy from Î³ÏÎ¬ÏÏ graphÅ, implies writing, description or measurement) is the statistical study of populations, especially human beings.
Since Thomas Malthus' population predictions to Paul Erlich's forecast of the population bomb, people have been interested in the effects of population. Future trends in population size, age structure, births, deaths and other demographic variables are of interest to a wide range of analysts, specifically demographers. Demography is the study of the size, distribution and composition of a population and its components of change, which includes fertility, mortality and migration. Demographers study populations to determine the causes and consequences of changes in population size, distribution and structure. They plan and conduct research designed to study the characteristics of human populations, such as growth and structure.