@article{Cigno2004,
author = {Cigno, A. and Luporini, A. and Pettini, A.},
title= {Hidden information problems in the design of family allowances},
year = {2004},
doi = {10.1007/s00148-003-0169-7},
journal = {Journal of Population Economics},
volume = {17},
number = {4},
pages = {645--655},
}