@article{Song2016,
author = {Song, X.},
title= {Diverging mobility trajectories: Grandparent effects on educational attainment in one- and two-parent families in the United States},
year = {2016},
doi = {10.1007/s13524-016-0515-5},
volume = {53},
number = {6},
pages = {1905--1932},
}