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Synthetic extinct generation method

HC Helena Cruz Castanheira
JS José Henrique Costa Monteiro da Silva
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The SEG method uses age and sex deaths distribution (D(x)) over a two-census period and the age-specific growth rates (r(x)) between those censuses to construct an estimated stationary population with distribution N^(x) by summing up the deaths recorded in the period weighted by the age-specific growth rates (Bennett and Horiuchi, 1981). The mathematical identity to estimate N^(x) is presented in Eq. 2.

Hence, the completeness of death counts can be estimated by comparing the constructed synthetic population counts with the observed counts from population censuses:

Beyond assuming that population is closed to migration, the SEG method assumes that death completeness is age-independent after a minimum age, there is no substantial age and sex misreporting, and there is no difference between censuses enumeration (Bennett and Horiuchi, 1981, 1984).

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