@article{Singer2013,
author = {Singer, E.  and Ye, C. },
title= {The use and effects of incentives in surveys},
year = {2013},
doi = {10.1177/0002716212458082},
journal = {The Annals of the American Academy of Political and Social Science},
volume = {645},
number = {1},
pages = {112--141},
}