@article{Siminski2012,
author = {Siminski, P. and Yerokhin, O.},
title= {Is the age gradient in self-reported material hardship explained by resources, needs, behaviors, or reporting bias?},
year = {2012},
doi = {10.1111/j.1475-4991.2011.00470.x},
volume = {58},
number = {4},
pages = {715--741},
}