Mulligan, Casey B; Sala-i-Martin, Xavier - C.E.P.R. Discussion Papers - 1995
We construct a set of human capital indexes for the states of the United States for each Census year starting in 1940 … search constraints. Some of the empirical findings are that the stock of human capital in the United States grew twice as … rapidly as the average years of schooling and that human capital inequality across states went up during the 1980s (while the …