Impact of personal income on mortality: Decomposition into biological vs. socio-economic effects

The influence of per capita income on life expectancy is well documented, mostly through studies multinational samples. However, one expects fairly weak correlations at both ends the span, that to say in early infancy and age groups elderly from 85 100 years. reason mortality largely controled by biological factors rather than socio-economic conditions. In order test this conjecture, we explore groups, separately France, United States South Korea. More precisely each country compare data as many regional subunits possible. One noteworthy constatation that, contrary a common view, personal only weakly correlated with infant (i.e. under year). broadly, propose conjecture pattern revealed analysis three countries also valid other developed countries.