Implements the abridged lifetable formulas given in the supplementary material to Andreev et. al. (2012). An entire lifetable is calculated, but only life expectancy at birth is returned.
LTabr(Mx, Age = c(0, 1, cumsum(rep(5, length(Mx) - 2))), radix = 1e+05)numeric life expectancy at birth
numeric vector of abridged mortality rates.
integer, abridged age lower bounds.
numeric. Can be anything positive.
Chiang's a(x) is assumed in the following way: \(a(0) = 0.07 + 1.7 * M(0)\), \(a(1) = 1.6\), \(a(\omega) = \frac{1}{M(\omega)}\), and all others are assumed at mid interval. The last age is assumed open. Everything else is pretty standard.
andreev2002algorithmDemoDecomp andreev2012excelDemoDecomp