“…Given the high industry-level variation in the timing and intensity of the Eastern Europe/China trade shock (see Section 5), we follow Autor et al (2014) in arguing that our story is more consistent with import shock exogeneity rather than employment share exogeneity. Moreover, Barth et al (2020) show that estimates of the e↵ect of trade on regional employment in Europe are identified primarily by the import shocks. To check for industry-level orthogonality, Borusyak et al (2022) recommend regressing current shocks on past outcomes.…”