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Nicholas Eberstadt and Sally Satel, Health and the Income Inequality Hypothesis: A Doctrine in Search of Data, AEI Press, January 2004 (aei.org)
In recent years, a variety of left-leaning academics have advanced an inequality hypothesis" suggesting that income inequality reduces the overall level of health in a society. Two AEI scholars, demographer Nicholas Eberstadt and medical doctor Sally Satel, examine the evidence for this hypothesis and find it greatly lacking. Conclusions drawn out of aggregate data swiftly vanish once one looks at the underlying data.
To illustrate the problem, Eberstadt and Satel hypothesize a country with perfectly equal income distribution and a society-wide life expectancy of 75 years. If one enormously wealthy person moved to the country, both average income and income inequality would increase sharply while life expectancy (and actual standards of living) would remain essentially unchanged. Compared to other countries with the ...