@article{Gerber2008,
author = {Gerber, T.P. and Cheung, S.},
title= {Horizontal stratification in postsecondary education: Forms, explanations, and implications},
year = {2008},
doi = {10.1146/annurev.soc.34.040507.134604},
journal = {Annual Review of Sociology},
volume = {34},
number = {1},
pages = {299--318},
}