@TechReport{CEPII:2010-07,
author={Antoine Berthou and Charlotte Emlinger},
title={Crises and the Collapse of World Trade: the Shift to Lower Quality },
year=2010,
month=March,
institution={CEPII},
type={Working Papers},
url={http://www.cepii.fr/CEPII/fr/publications/wp/abstract.asp?NoDoc=2385},
number={2010-07},
}