Comparer des méthodes

	Coale-Demeny Model Life Tables	Preston-Coale Method
Domaine	Démographie	Démographie
Famille	Survival analysis	Process / pipeline
Année d'origine	1966	1982
Auteur d'origine	Ansley J. Coale & Paul Demeny	Samuel H. Preston & Ansley J. Coale
Type	Empirical system of standard age patterns of mortality	Death distribution method that reconstructs a population from its deaths to estimate registration completeness
Source fondatrice	Coale, A. J., Demeny, P., & Vaughan, B. (1983). Regional Model Life Tables and Stable Populations (2nd ed.). Academic Press, New York. ISBN: 9780121770808	Preston, S. H., & Coale, A. J. (1982). Age structure, growth, attrition, and accession: a new synthesis. Population Index, 48(2), 217–259.
Alias	Coale-Demeny Life Tables, Regional Model Life Tables, Coale-Demeny System	Synthetic extinct generations method, SEG method, Preston-Coale death distribution method, Preston-Coale Yöntemi
Apparentées	4	4
Résumé	The Coale-Demeny regional model life tables are a system of standard age patterns of mortality, distilled from hundreds of empirical life tables into four regional families — North, South, East, and West — each indexed by a mortality level. Given only a single summary of mortality, such as life expectancy at birth or a child-survival measure, the system supplies a complete, internally consistent age schedule of death rates. For decades they have been the default tool for inferring full mortality patterns in populations with incomplete or unreliable death data, especially in developing countries and historical demography.	The Preston-Coale method, also called the synthetic extinct generations method, estimates the completeness of death registration by rebuilding a population from the very deaths it records. Introduced by Samuel Preston and Ansley Coale in 1982, it uses the variable-r relations of a non-stable population to project each age group's future deaths forward, growth-adjust them, and accumulate them into the number of people who must currently be alive at each age. Comparing this implied population with the observed census count reveals what fraction of deaths the vital system actually captures.