@TechReport{CEPII:1997-03,
author={Laurence Boone},
title={Symmetry and Asymmetry of Supply and Demand Shocks in the European Union},
year=1997,
month=March,
institution={CEPII},
type={Working Papers},
url={http://www.cepii.fr/CEPII/en/publications/wp/abstract.asp?NoDoc=52},
number={1997-03},
}