In a recent paper, R. Schoen poses the problem of constructing a set of k interrelated increment-decrement life tables but presents explicit solutions only for two-table and three-table models. Here, we derive the k-table analogue of the single-table formula (Schoen's Eq. 11) and illustrate its use in a problem area not included in Schoen's list of potential applications, namely, multiregional life table construction. In this particular application, increments are due to in-migration and decrements result from out-migration.
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Rogers et al. (1976) studied this question.
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