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| Parity Progression Ratio× | 生命表分析× | |
|---|---|---|
| 领域 | 人口学 | 人口学 |
| 方法族≠ | Process / pipeline | Survival analysis |
| 起源年份≠ | 1953 | 1984 |
| 提出者≠ | Louis Henry (formalized in modern demography) | Demographic/actuarial tradition; Chiang |
| 类型≠ | Order-specific fertility measure built from a sequence of conditional progression probabilities | Age-structured mortality estimator |
| 开创性文献≠ | Preston, S. H., Heuveline, P., & Guillot, M. (2001). Demography: Measuring and Modeling Population Processes. Blackwell. ISBN: 9781557864512 | Chiang, C. L. (1984). The Life Table and Its Applications. Robert E. Krieger Publishing. ISBN: 978-0-89874-565-2 |
| 别名 | PPR, Birth progression ratio, Parity progression probability, Doğum Sırası İlerleme Oranı | Mortality Table, Actuarial Table, Survival Table, Yaşam Tablosu |
| 相关≠ | 4 | 3 |
| 摘要≠ | A parity progression ratio is the conditional probability that a woman who has already had a given number of children goes on to have one more. By converting a static parity distribution into a sequence of birth-by-birth transition probabilities, the method reveals where childbearing stops within a cohort and lets demographers rebuild completed fertility from the bottom up. It is the natural fertility analogue of a survival or life-table transition, treating each additional birth as a further step a woman may or may not take. | 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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