First, levels of human capital track regional income levels well. The world's richest regions (OECD, EECA and LAC) have the highest levels of human capital (with a human capital index ranging from 2.6 to 3.0) and high educational attainment (people is these regions spend nine years in school on average). Second, capital stock per capita is lowest in regions located at the bottom of the world's income distribution (USD 9 100 in SA and USD 8 100 in SSA), while top income regions have the highest accumulation of physical capital (USD 11 500 in OECD).