A longitudinal analysis of infant and senescent mortality using mixture models

R. M. Green and M. S. Bebbington

Journal of Applied Statistics, 2013, vol. 40, issue 9, 1907-1920

Abstract: We construct a mixture distribution including infant, exogenous and Gompertzian/non-Gompertzian senescent mortality. Using mortality data from Swedish females 1751--, we show that this outperforms models without these features, and compare its trends in cohort and period mortality over time. We find an almost complete disappearance of exogenous mortality within the last century of period mortality, with cohort mortality approaching the same limits. Both Gompertzian and non-Gompertzian senescent mortality are consistently present, with the estimated balance between them oscillating constantly. While the parameters of the latter appear to be trending over time, the parameters of the former do not.

Date: 2013
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DOI: 10.1080/02664763.2013.800032

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