"Gravity and Comparative Advantage: Estimation of Trade Elasticities for the Agricultural Sector"

NBER Working Paper 24772 - co-authored with Kari E.R. Heerman (ERS/USDA) and presented at "Trade and Agriculture Conference", NBER, Cambridge, May 2018.  Discussion of methodology for adapting applied general equilibrium model to reflect both random and non-random variation in agricultural productivity across countries.