Longevity Advances in High‐Income Countries, 1955–96

The advance of life expectancy within high‐income countries from 1955 to 1996 is well represented by a straight‐line trend. This explains more of the variance on average, and in 19 of 21 high‐income countries, than logged or unlogged age‐standardized death rates. Change in life expectancy in individual countries over this period was partially predicted by a country's level relative to the rest of this group of high‐income countries and partially by a country's own prior rate of advance, with substantial convergence toward the group mean for both measures.