  The analytic derivation of a more general model of survival-mortality and the
estimation of a parameter bx related to the Healthy Life Years Lost (HLYL) is
followed with the formulation of a computer program providing results similar
to those of the World Health Organization for the Healthy Life Expectancy
(HALE) and the corresponding HLYL estimates. This program is an extension of
the classical life table including more columns to estimate the cumulative
mortality, the average mortality, the person life years lost and finally the
HLYL parameter bx. Evenmore, a further extension of the Excel program based on
the Sullivan method provides estimates of the Healthy Life Expectancy at every
year of the lifespan for five different types of estimates that are the Direct,
WHO, Eurostat, Equal and Other. Estimates for several countries are presented.
It is also presented a methodology and a program to bridge the gap between the
World Health Organization (HALE) and Eurostat (HLE) healthy life expectancy
estimates. The latest version of this program (SKI-6) appear in the
Demographics2020 website.

Populations and Evolution