@inbook{Card1999,
author = {Card, D.},
title= {The causal effect of education on earnings},
year = {1999},
doi = {10.2307/2523702},
editor = {Bound, J.},
editor = {Jaeger, D.A.},
booktitle = {Handbook of labor economics},
address = {New York},
publisher = {Elsevier},
pages = {1801--1863},
}