The Gini coefficient is based on the sum of pairwise income differences. For an individual, differences vis-à-vis poorer people represent advantage, and those versus richer people deprivation. Any weighted average of deprivation and advantage generates a “Gini admissible” personal...

This paper examines the impacts of a wide range of tax provisions on the incentive to invest in human capital, and shows how these effects can be quantified using effective tax rates, or ETRs. For individuals with median earnings, ETRs on the human capital formed in first-degree university study...