Population change and structure
The demographic transition model [demographic transition model: A measure of population change over time which tracks birth and death rates. ] shows population change over time. It studies how birth rate and death rate affect the total population of a country.
As a country passes through the demographic transition model, the total population rises. Most LEDCs [LEDC: A Less Economically Developed Country (LEDC) has low levels of development, based on economic indicators, such as gross domestic product (the country's income). ] are at stage 2 or 3 (with a growing population and a high natural increase). Most MEDCs [MEDC: A More Economically Developed Country (MEDC) has high levels of development based on economic indicators such as gross domestic product (the country's income). ] are now at stage 4 of the model and some such as Germany have entered stage 5.
As populations move through the stages of the model, the gap between birth rate and death rate first widens, then narrows. In stage 1 the two rates are balanced. In stage 2 they diverge [diverge: Move away from each other. ], as the death rate falls relative to the birth rate. In stage 3 they converge [converge: Move towards each other. ] again, as the birth rate falls relative to the death rate. Finally in stage 4 the death and birth rates are balanced again but at a much lower level.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.