@inbook{Chamberlain1985,
author = {Chamberlain, G.},
title= {Heterogeneity, Omitted Variable Bias, and Duration Dependence},
year = {1985},
doi = {10.1017/CCOL0521304539.001},
editor = {Heckman, J.J.},
editor = {Singer, B.S.},
booktitle = {Longitudinal Analysis of Labor Market Data},
address = {Cambridge},
publisher = {Cambridge University Press},
pages = {3--38},
}