Definitions for "DEMOGRAPHIC TRANSITION"
This term refers to the changes populations undergo (usually associated with modernization) as they move from a situation of high mortality and fertility to a stage in which mortality has declined but fertility is still high. The third phase is characterized by low fertility and mortality (Omran 1971).
Hypothesis that countries, as they become industrialized, have declines in death rates followed by declines in birth rates.
change in a society from a situation of high mortality and fertility to one of low mortality and fertility, resulting in a shift from a low to a high proportion of older people, and an increase in total population size.