keyfitz {demogR} | R Documentation |
Utility used by life.table
to graduate the person-years lived
by those dying in the interval by the method of Keyfitz and Flieger
(1990).
keyfitz(b0, nMx)
b0 |
two element vector of regression coefficients provided in
Keyfitz and Flieger (1990). Default value: b0=c(0.07,1.7) . |
nMx |
period central death rates: =nDx/nKx . |
Utility function called by life.table
.
The first two values (age classes 0-1 and 1-5) of the nax column of a period life table.
Keyfitz, N., and W. Flieger. 1990. World population growth and aging: Demographic trends in the late twentieth century. Chicago: University of Chicago Press.
data(goodman) ## default type="kf" vlt <- with(goodman, life.table(x=age, nKx=ven.nKx, nDx=ven.nDx))