@inbook{Cunha2006,
author = {Cunha, F. and Heckman, J. and Lochner, L.},
title= {Interpreting the evidence on life cycle skill formation},
year = {2006},
doi = {10.1016/S1574-0692(06)01012-9},
editor = {Hanushek, E.A.},
editor = {Machin, S.},
editor = {Woessmann, L.},
booktitle = {Handbook of the economics of education Volume 1},
address = {Amsterdam},
publisher = {Elsevier},
pages = {697--812},
}