title: Calculation of age-specific fertility schedules from tabulations of parity in two censuses.
abstract: The mathematics of stable populations recently has been generalized to cover populations with time-varying fertility and mortality by a modification incorporating the sum of age-varying growth rates in place of the fixed growth rate of a stable population. Equations that characterize nonstable populations apply to any cohort-like phenomenon with a measurable property that cumulates gains or losses through time. In particular, the equations fit the relation between a population's average parity at a given age and age-specific fertility rates previously experienced at lower ages. Techniques devised to derive an intercensal life table from single-year age distributions in two censuses are adapted to estimate accurate intercensal fertility schedules from distributions of parity by age of woman in two censuses. Birth-order specific fertility schedules are also estimated.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002681:China; D005260:Female; D005298:Fertility; D006801:Humans; D007723:Korea; D008875:Middle Aged; D008962:Models, Theoretical; D010298:Parity