@article{Western2009,
author = {Western, B. and Bloom, D.},
title= {Variance function regressions for studying inequality},
year = {2009},
doi = {10.1111/j.1467-9531.2009.01222.x},
journal = {Sociological Methodology},
volume = {39},
number = {1},
pages = {293--326},
}