Schoen R
Demography. 1978 Nov;15(4):625-35.
A simple, accurate method of life table construction is advanced based upon a new way to estimate Chiang's nax (the average number of years lived in the x to x + n age interval by those dying in the interval). The estimate for nax leads immediately to an expression for lx+n (the survivors to age x + n) in terms of lx and the known mortality rates for the interval x to x+n and the two adjacent intervals. The complete solution for the basic life table is given. The proposed method and five other easily applied methods are then compared against the standard provided by the U.S. life tables for 1969-1971. The results attest to the excellent performance and high degree of accuracy of the proposed method. Finally, extensions of the method to multiple decrement and associated single decrement life tables are briefly described.
基于一种估算蒋氏nax（在x至x + n年龄区间内死亡者在该区间的平均存活年数）的新方法，提出了一种简单、准确的生命表构建方法。对nax的估算直接得出了lx + n（存活至x + n岁者）关于lx以及x至x + n区间和两个相邻区间已知死亡率的表达式。给出了基本生命表的完整解。然后将所提出的方法与其他五种易于应用的方法与1969 - 1971年美国生命表提供的标准进行比较。结果证明了所提出方法的出色性能和高度准确性。最后，简要描述了该方法向多重递减和相关单重递减生命表的扩展。
