Some Methodological and Empirical Considerations in the Construction of Increment-Decrement Life Tables

The topic of this paper revolves around the calculation of those combined life tables that allow entries as well as withdrawals from alternative states, namely, increment-decrement life tables. The paper provides a complete theoretical presentation of such tables, focusing on the contrasts between the movement and the transition approaches. It also sets forth, for both approaches, life table construction methods based on three alternative methodological variations: the linear and the cubic integration methods, and an interpolative-iterative method. Finally, the paper develops more precise methods for constructing a multiregional life table, for which the generally available death and migration rates are not consistent with either the movement or the transition approaches