At 11:42 AM 12/06/99 -0700, spike spikulated:
>One's l.q. is the average of your parents' l.q. One's l.q. is
>one's age at death, assuming natural causes, otherwise one's
>l.q. stays the average of the parents'. If one (or one's parent)
>is older than the parent's average l.q, use the larger number.
Well, there's regression to the mean to factor in - plus or minus the general background level of your gestational and infant nutrition and then the hardship of life for your cohort, the stochastic impact of disease, all that.