These stages represent advanced industrial societies within the Demographic Transition Model (DTM). In Stage Three, birth rates start declining while death rates remain low. In Stage Four, both birth rates and death rates are relatively low.
Related terms
Urbanization: The process of a population shifting from rural to urban areas.
Aging population: A demographic trend characterized by an increasing proportion of older individuals within the population.
Fertility rate: The average number of children born to a woman during her reproductive years.