Journal
THEORETICAL POPULATION BIOLOGY
Volume 134, Issue -, Pages 53-60Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.tpb.2020.04.005
Keywords
Gompertz-Makeham distribution; Gamma Gompertz-Makeham distribution; Life expectancy; Hypergeometric function; Mortality
Funding
- FAPEMIG (Belo Horizonte/MG, Brazil)
- CAPEs (Brazil)
- Brazilian agency CNPq
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Missov and Lenart (2013) derived closed-form solutions to the life expectancy and remaining life expectancy at age x when the mortality is governed by a Gompertz-Makeham hazard, which is a parametric model commonly applied to human mortality data at adult and old ages. However, the closed-form expressions provided by these authors are not correct. We provide, therefore, valid and correct expressions using elementary calculus. We also consider numerical studies using real data to show that the formulas we provide deliver satisfactory results. (C) 2020 Elsevier Inc. All rights reserved.
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