Design & Copyright Jan Karman Last revised: January 2021
Ageing workers in an ageing society
The project "Ageing workers in an ageing society: Labour force transitions and work in late life" aims to unravel the determinants of the behaviour of older workers and employers in dealing with the new reality of extended working life.
Source: Demos/Nederlands Interuniversitair Demografisch Instituut
Mortality tables are usually graduated for either practical or scientific purposes. The formulae, in which the mortality is expressed as a function of x (= age) are often of the type (Makeham's law):
mx = A + B.cx (force of mortality)
with A, B and c as parameters. Finding the values of those parameters from the crude material is the hard part.
King-Hardy's method is a suitable way to transform this power function into a linear equation system; it is solved here by way of a least square K-runtime function.
See also E.Zwinggi - Versicherungsmathematik
When invoked, one will find four controls in the bottom part. The first two controls act like a spinbox, the two right most controls simulate the Windows-locator. The challenge is to find as large as possible ranges for making the "law" valid.
Later, famous methods came from Th.N. Thiele, published posthumously in 1910, and recent approaches and remarks can be found in W.J. Willemse
Recommended for Africa: G.M.K. Kpedekpo - Essentials of Demographic Analysis for Africa
Jan Karman LinkedIn Middelburg (Neth), November 2006