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Supply Chain Adjustments to Tariff Shocks: Evidence from Firm Trade Linkages in the 2018-2019 U.S. Trade War

August 2024

Working Paper Number:

CES-24-43

Abstract

We use the 2018-2019 U.S. trade war to examine how supply chains adjustments to a tariff cost shock affect imports and exports. Using confidential firm-trade linked data, we show that the decline in imports of tariffed goods was driven by discontinuations of U.S. buyer'foreign supplier relationships, reduced formation of new relationships, and exits by U.S. firms from import markets altogether. However, tariffed products where imports were concentrated in fewer suppliers had a smaller decline in import growth. We then construct measures of export exposure to import tariffs by linking tariffs paid by importing firms to their exported products. We find that the most exposed products had lower exports in 2018-2019, with most of the impact occurring in 2019.

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:
import, export, international trade, good, tariff, exporter, importing, inventory, spillover, supplier, exported, imported, trading, importer

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:
Ordinary Least Squares, International Trade Commission, Bureau of Economic Analysis, Longitudinal Business Database, Federal Register, Department of Homeland Security, Harmonized System, Herfindahl Hirschman Index, Census Bureau Disclosure Review Board, Longitudinal Firm Trade Transactions Database, Disclosure Review Board, Michigan Institute for Data Science

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