“…Since our econometric estimates identify a partial elasticity this framework fits tightly with the empirics. The recent literature on trade dynamics is rich in both substantive mechanisms and quantification (see, among many others, Costantini and Melitz, 2007;Ruhl, 2008;Drozd and Nosal, 2012;Burstein and Melitz, 2013;Alessandria and Choi, 2014;Alessandria, Choi, and Ruhl, 2021;Ruhl and Willis, 2017;Blaum, 2019;Fitzgerald, Haller, and Yedid-Levi, 2016;Leibovici and Waugh, 2019;Alessandria, Arkolakis, and Ruhl, 2021;Steinberg, 2022). The goal of this section is not to revisit all of the proposed mechanisms for gradual adjustment of trade.…”