The Short Version
The named studies did characterize tariff costs as falling mainly on U.S. importers and consumers. Both Amiti et al. (2019) and Fajgelbaum et al. (2020) reported near-complete pass-through of the 2018 tariffs into U.S. prices, meaning foreign exporters did not absorb most of the burden. Additional findings about producer gains or retaliation do not negate that core conclusion.