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Notes on Formula Graduation of South African 56/58 Ultimate Mortality

Published online by Cambridge University Press:  11 August 2014

R. C. Lloyd
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Abstract

1. The S.A. 56/58 Ultimate data (see J.I.A. Vol. 87, p. 371) was originally graduated by summation formula and arising out of the discussions it was decided to attempt to fit a mathematical formula of the Perks type.

2. To start with, data below age 30 were excluded.

3. The generalized Perks formula

was chosen—the thought being that if some of the parameters were not needed the process of curve fitting would result in these parameters assuming small values.

Type
Research Article
Information
Journal of the Staple Inn Actuarial Society , Volume 17 , Issue 1 , July 1962 , pp. 42 - 47
Copyright
Copyright © Institute of Actuaries Students' Society 1962

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