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A tilting algorithm for the estimation of fractional age survival probabilities

机译:一种倾斜算法,用于估计小数年龄生存概率

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摘要

Life tables used in life insurance determine the age of death distribution only at integer ages. Therefore, actuaries make fractional age assumptions to inter polate between integer age values when they have to value payments that are not restricted to integer ages. Traditional fractional age assumptions as well as the frac tional independence assumption are easy to apply but result in a non-intuitive overall shape of the force of mortality. Other approaches proposed either require expensive optimization procedures or produce many discontinuities. We suggest a new, com putationally inexpensive algorithm to select the parameters within the LFM-family introduced by Jones and Mereu (Insur Math Econ 27:261-276, 2000). In contrast to previously suggested methods, our algorithm enforces a monotone force of mortality between integer ages if the mortality rates are monotone and keeps the number of discontinuities small.
机译:人寿保险中使用的人寿表仅在整数年龄时确定死亡的年龄分布。因此,精算师在必须对不限于整数年龄的付款进行估值时,会做出分数年龄假设以插补整数年龄值。传统的分数年龄假设和分数独立性假设很容易应用,但导致死亡力量的总体形状不直观。提出的其他方法要么需要昂贵的优化程序,要么会产生许多不连续性。我们建议使用一种计算成本低廉的新算法来选择Jones和Mereu引入的LFM系列中的参数(Insur Math Econ 27:261-276,2000)。与以前建议的方法相比,如果死亡率为单调,我们的算法会在整数年龄之间强制施加死亡率的单调力,并使不连续性的数量保持较小。

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