Age composition in the absence of mortality and in other odd circumstances | Zendy

Ansley J. Coale | Zendy

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Age composition in the absence of mortality and in other odd circumstances

Author(s) -

Ansley J. Coale

Publication year - 1973

Publication title -

demography

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.099

H-Index - 129

eISSN - 1533-7790

pISSN - 0070-3370

DOI - 10.2307/2060881

Subject(s) - demography , fertility , age structure , population , composition (language) , component (thermodynamics) , mortality rate , age groups , sociology , linguistics , philosophy , physics , thermodynamics

The age composition of populations experiencing no mortality and various kinds of fertility is derived. It is then shown that, if successive mortality schedules can be expressed as the sum of a component that varies with age and a component that varies with time, only the former has any effect on the age structure of the population. One implication is that a population in which mortality varies with time but not with age has the same composition as a population with no mortality at all.

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