What's the best predictor of life expectancy?
Education, not income, is the best predictor of a long and healthy life, according to data from 174 countries analysed over 45 years.
This is in contrast to previous research, which has found rising income and improved living standards to be the most important factors.
Vienna University demographers have plotted life expectancy against the mean years of schooling of the adult population by redrawing the Preston curve (with GDP per person on the horizontal axis against life expectancy on the vertical axis).
They have demonstrated