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| Arriaga Decomposition× | Life Table× | |
|---|---|---|
| Field | Demography | Demography |
| Family≠ | Process / pipeline | Survival analysis |
| Year of origin | 1984 | 1984 |
| Originator≠ | Eduardo E. Arriaga | Demographic/actuarial tradition; Chiang |
| Type≠ | Age-specific decomposition of a difference in life expectancy | Age-structured mortality estimator |
| Seminal source≠ | Arriaga, E. E. (1984). Measuring and explaining the change in life expectancies. Demography, 21(1), 83–96. DOI ↗ | Chiang, C. L. (1984). The Life Table and Its Applications. Robert E. Krieger Publishing. ISBN: 978-0-89874-565-2 |
| Aliases | Arriaga's method, Life-expectancy decomposition, Age decomposition of life expectancy, Arriaga Ayrıştırması | Mortality Table, Actuarial Table, Survival Table, Yaşam Tablosu |
| Related≠ | 4 | 3 |
| Summary≠ | 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. |
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