@ARTICLE{CEPII:207,
title={National Borders Matter… But Less and Less},
author={Thierry Mayer },
year=2001,
month=December,
journal={La lettre du CEPII},
number={207},
institution={CEPII},
abstract={},
keywords={Border effects ; Gravity model ; Trade policy ; International Trade ; International trade models and databases },
url={http://www.cepii.fr/CEPII/en/publications/lettre/abstract.asp?NoDoc=248}
}