@inbook{Card1999,
author = {Card, D. },
title= {The causal effect of education on earnings},
year = {1999},
doi = {10.1016/S1573-4463(99)03011-4},
editor = {Ashenfelter, O.},
editor = {Card, D.},
booktitle = {Handbook of Labor Economics},
address = {Amsterdam},
publisher = {North Holland},
pages = {1801−1863},
}