@article{Poel2012,
author = {Poel, E. and Van Doorslaer, E. and O’Donnell, O.},
title= {Measurement of inequity in health care with heterogeneous response of use to need},
year = {2012},
doi = {10.1016/j.jhealeco.2012.05.005},
volume = {31},
number = {4},
pages = {676--689},
}