Compară metode

	Arriaga Decomposition	Analiza tabelelor de mortalitate
Domeniu	Demografie	Demografie
Familie	Process / pipeline	Survival analysis
Anul apariției	1984	1984
Autorul original	Eduardo E. Arriaga	Demographic/actuarial tradition; Chiang
Tip	Age-specific decomposition of a difference in life expectancy	Age-structured mortality estimator
Sursa seminală	Arriaga, E. E. (1984). Measuring and explaining the change in life expectancies. Demography, 21(1), 83–96.	Chiang, C. L. (1984). The Life Table and Its Applications. Robert E. Krieger Publishing. ISBN: 978-0-89874-565-2
Denumiri alternative	Arriaga's method, Life-expectancy decomposition, Age decomposition of life expectancy, Arriaga Ayrıştırması	Mortality Table, Actuarial Table, Survival Table, Yaşam Tablosu
Înrudite	4	3
Rezumat	Arriaga decomposition is a demographic technique that breaks down the difference in life expectancy between two life tables — two countries, two time points, or two groups — into the contributions of mortality change at each age. Introduced by Eduardo Arriaga in 1984, it tells the analyst not just that life expectancy rose or fell, but exactly which ages drove the change, separating the direct effect of mortality change within an age interval from the indirect effect of the extra survivors that change passes on to older ages.	A life table is a systematic, age-structured summary of the mortality experience of a population. It traces a hypothetical cohort of births — conventionally 100,000 — through successive age intervals, recording how many survive, how many die, and how many person-years are lived at each interval. The method was formalized in its modern probabilistic form by Chiang (1984), synthesizing centuries of actuarial and demographic practice into a rigorous statistical framework applicable to human and biological populations alike.