Demographers seek to understand population dynamics by investigating three main demographic processes: birth, migration, and aging (including death).
All three of these processes contribute to changes in populations, including how people inhabit the earth, form nations and societies, and develop culture..
Biological Demography (Biodemography) is an emerging area of classical demography consisting of two subcategories including biological demography and biomedical demography, the former concerned primarily with the experimental demography of non- human species such as fruit flies, nematode worms, and laboratory rodents, .
Economics and demography are mutually related to each other
Demography studies regional distribution of the population
The regional distribution of population deeply affects the economic activities and economic factors of the society
In this way, information gathered by the demographers proves useful to the economists
Sociology: Demography is a science related with population
It studies different aspects of population like its size, density, effects of birth rate, death rate, migration, etc
Sociology is the study of social activities of man and social relations formed out of that
