@article{Psacharapoulos2004,
author = {Psacharapoulos, G. and Patrinos, H.A.},
title= {Returns to Investments in Education: A Further Update},
year = {2004},
doi = {10.1080/0964529042000239140},
journal = {Education Economics},
volume = {12},
number = {2},
pages = {111--134},
}