@article{Das2013,
author = {Das, J. and Do, Q.T. and Shaines, K. and Srikant, S.},
title= {U.S. and them: The geography of academic research},
year = {2013},
doi = {10.1016/j.jdeveco.2013.07.010},
volume = {105},
number = {1},
pages = {112--130},
}