00503nam a2200157Ia 4500008004100000082002000041100002700061245006800088250001000156260001500166300000600181362001100187490000800198490010800206773003100314260821b        |||||||| |||| 00| 0 eng d  a378.107 P974.ES  aPsacharopoulos, George  aEstimating shadow rates of return to investment in educationb/  ano. 1  c1970a b   a   aWinter  vv.5  aLondon School of Economics and Political Science, higher education research unit reprint series, no. 31  tJournal of Human Resources