@article{Thomas2011,
author = {Thomas, K.J.A.},
title= {What explains the increasing trend in African emigration to the U.S.?},
year = {2011},
doi = {10.1111/j.1747-7379.2010.00837.x},
journal = {International Migration Review},
volume = {45},
number = {1},
pages = {3--28},
}