A reducible four-parameter system of model life tables.
A reducible four-parameter system of model life tables.
复制标题
模型寿命表的可简化四参数系统。
DOI:
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发表时间:
1983
期刊:
影响因子:
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通讯作者:
M. Stoto
中科院分区:
文献类型:
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作者:
D. Ewbank;J. León;M. Stoto
Abstract In this paper a four-parameter extension of Brass's relational system of model life tables is suggested that (1) matches a wide range of empirical age patterns of mortality, (2) is easy to apply, especially to partial life tables, and (3) contains demographically meaningful parameters. A test of the model on a set of 62 empirical life tables indicates that four parameters are necessary and sufficient for fitting a wide range of mortality patterns. A further test on an historical series of Swedish life tables reveals a consistent pattern of mortality change. Examination of the parameters for a set of geographicallyrelated life tables suggests a way to define families of life tables. Identification of such temporal and spatial relationships allows the model to be reduced to a form with twoor three-parameters for application to incomplete or inaccurate data.