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	Dependency Ratio	Mean Age at Childbearing
Campo	Demografia	Demografia
Famiglia	Process / pipeline	Process / pipeline
Anno di origine	1956	1968
Ideatore	Standard demographic practice (United Nations / national statistical offices)	Standard demographic practice (fertility schedule moments)
Tipo	Ratio summarizing the age structure of economic dependency	Summary location measure of the age pattern of fertility
Fonte seminale	Preston, S. H., Heuveline, P., & Guillot, M. (2001). Demography: Measuring and Modeling Population Processes. Blackwell. ISBN: 9781557864512	Preston, S. H., Heuveline, P., & Guillot, M. (2001). Demography: Measuring and Modeling Population Processes. Blackwell. ISBN: 9781557864512
Alias	Age dependency ratio, Youth and old-age dependency ratio, Total dependency ratio, Bağımlılık Oranı	MAC, Mean age of the fertility schedule, Mean age of mothers at birth, Ortalama Doğurganlık Yaşı
Correlati	4	4
Sintesi	The age dependency ratio is a simple summary measure of a population's age structure that expresses the number of people in 'dependent' age groups — children and the elderly — relative to those of working age, conventionally per 100 working-age persons. It is split into a youth dependency ratio and an old-age dependency ratio, and it is among the most widely used demographic indicators of the potential economic burden an age structure places on its productive population.	The mean age at childbearing is the average age of mothers at the birth of their children, computed as the fertility-rate-weighted mean of maternal age over the age-specific fertility schedule. As the first moment of the fertility curve, it summarizes the tempo — the timing — of childbearing in a single number, complementing the total fertility rate, which measures quantum, or how many children are born.