@article{Brown2009,
author = {Brown, S.L. and Manning, W.D.},
title= {Family Boundary Ambiguity and the Measurement of Family Structure: The Significance of Cohabitation},
year = {2009},
doi = {10.1353/dem.0.0043},
journal = {Demography},
volume = {46},
number = {1},
pages = {85--101},
}