@article{Abraham2006,
author = {Abraham, K.G. and Maitland, A. and Bianchi, S.M.},
title= {Nonresponse in the American time use survey: Who is missing from the data and how much does it matter?},
year = {2006},
doi = {10.1093/poq/nfl037},
volume = {70},
number = {Special Issue 5},
pages = {676--703},
}