@TechReport{CEPII:2021-11,
author={Keith Head and Thierry Mayer},
title={Poor Substitutes? Counterfactual methods in IO and Trade compared},
year=2021,
month=December,
institution={CEPII},
type={Working Papers},
url={https://www.cepii.fr/CEPII/fr/publications/wp/abstract.asp?NoDoc=13143},
number={2021-11},
}