@article{Molloy2011,
author = {Molloy, R. and Smith, C.L. and Wozniak, A.},
title= {Internal Migration in the United States},
year = {2011},
doi = {10.1257/jep.25.3.173},
journal = {Journal of Economic Perspectives},
volume = {25},
number = {3},
pages = {173--196},
}