APHUG Chapters 2.4-2.9

Demographic Balancing Equation

An equation demographers use to descibe the future population of a region at any scale. (Future pop. = current pop + (Number of Births - Number of Deaths) + (Number of immigrants - Number of Emigrants)

Population Doubling Time

The number of years it takes for a population to double in size when growing exponentially

RNI

The percentage in which a regions pop is growing or shrinking without migration

Demographic momentum

Occurs between stages 3 and 4 on the dtm where pop will continue to grow for at least one generation because even though fertility rates have lowered, people live longer.

Epidemiological Transition Model

An extension of the Demographic transition model that shows predictable stages in disease/life expectancy that countries experience as they develop. Explains changing death rates.

Boserup Theory

A theory created by ester Boserup that said the more people there are in a region, the more hands there are to work, argues the benefits of a large population.

Malthusian Theory

A theory created by Thomas Malthus in 1798 that said that in the coming years, the number of crops produced would not be enough to support the growing population. This did not happen.

Neo-Malthusians

People who still believe in Malthus’s Ideas and apply them to the world today