Goldin, Claudia; Katz, Lawrence F. - National Bureau of Economic Research (NBER) - 1999
We present the first estimates of the returns to years of schooling before 1940 using a large sample of men and women, employed in a variety of sectors and occupations, from the Iowa State Census of 1915. We find that the returns to a year of high school, and to a year of college, were...