@article{Fitzgerald1998,
author = {Fitzgerald, J. and Gottschalk, P. and Moffitt, R},
title= {An analysis of sample attrition in panel data},
year = {1998},
doi = {10.2307/146433},
journal = {The Journal of Human Resources },
volume = {33},
number = {2},
pages = {251−299},
}