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Claim analyzed
Finance“Amiti, Redding, and Weinstein (2019) found that the 2018 United States tariffs raised United States import prices nearly one-for-one.”
Submitted by Bold Dolphin ec25
The conclusion
The claim accurately reflects the paper's main result: the 2018 tariffs were passed through almost fully into the prices paid by U.S. importers. The key caveat is that this refers to tariff-inclusive import prices, not foreign exporters raising their pre-tariff prices one-for-one. That missing definition makes the wording somewhat imprecise, but not materially wrong.
Caveats
- The finding is about tariff-inclusive prices paid by U.S. importers; pre-tariff border/export prices reportedly changed little.
- Without that definition, readers could misread the result as foreign exporters raising their own prices, which is not what the paper primarily shows.
- The 2019 analysis focused on the 2018 trade-war period; longer-run adjustments such as sourcing changes were addressed in later work.
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Sources
Sources used in the analysis
In the wake of this increase in trade protection, the United States experienced substantial increases in the prices of intermediates and final goods... and the complete pass-through of the tariffs into domestic prices of imported goods. Therefore, the full incidence of the tariffs has fallen on domestic consumers and importers so far.
Using data from 2018, a number of studies have found that recent U.S tariffs have been passed on entirely to US importers and consumers.
Using data from 2018, a number of studies have found that recent U.S. tariffs have been passed on entirely to U.S. importers and consumers.
Over the course of 2018, the U.S. experienced substantial increases in the prices of intermediates and final goods... and complete passthrough of the tariffs into domestic prices of imported goods. Overall, using standard economic methods, we find that the full incidence of the tariff falls on domestic consumers and importers.
Using data from 2018, a number of studies have found that recent U.S tariffs have been passed on entirely to US importers and consumers. In Amiti, Redding and Weinstein (2019), we find that a substantial component of the response to the U.S. import tariffs came via a change in source of supply.
Our past work found that foreign exporters did not lower their prices at all, so the full incidence of the tariffs was borne by the U.S. That is, there was 100 percent pass-through from tariffs into import prices. Following a 9-percentage-point increase in tariffs on Chinese goods levied in 2018 and 2019... Mary Amiti, Chris Flanagan, Sebastian Heise, and David E. Weinstein.
Early work in this literature includes Amiti, Redding and Weinstein (2019) and Fajgelbaum et al. (2019) who find near-complete pass-through of tariffs to US import prices.
Regressing the changes in the tariff-inclusive import prices on the changes in the tariffs, we find almost complete pass-through of the tariffs into the prices paid by US importers. (This is consistent with the findings of Fajgelbaum et al, 2019). Therefore, although in principle the effect of higher tariffs on domestic prices could be offset by foreign exporters lowering their pre-tariff prices, we find little evidence of such an improvement in the terms of trade up to now.
Authors Mary Amiti, Stephen Redding, and David Weinstein found that almost all of the 2018 tariffs were passed on to importers and consumers through higher prices. Given that tariffs over 2018 ranged between 10 and 30 percent, this indicates that most of the tariffs were passed on to US consumers and importers.
We find that by December 2018, import tariffs were costing US consumers and the firms that import foreign goods an additional $3.2 billion per month in added tax costs and another $1.4 billion per month in deadweight welfare (efficiency) losses.
This harks back to 2018, when President Trump imposed 25% tariffs on US$16 billion of imported steel, and 10% tariffs on US$9 billion of imported aluminum, during his first term. The measures at that time led to increased domestic production but also sparked retaliatory tariffs, raising costs and domestic prices for downstream industries.
Research by Mary Amiti, Stephen Redding and David Weinstein estimates the effects of this change in US trade policy on domestic consumers and the firms that import foreign goods. What has been happening to the US economy as a result of the Trump administration's 2018 round of import tariffs?
We examine conventional approaches to evaluating the economic impact of protectionist trade policies. We illustrate these conventional approaches by applying them to the tariffs introduced by the Trump administration during 2018. In the wake of this increase in trade protection, the United States experienced substantial increases in the prices of intermediates and final goods... and the complete pass-through of the tariffs into domestic prices of imported goods.
U.S. tariff-inclusive import prices rose by nearly the full tariff increase (i.e., there was close to 100% pass-through rate of the tariff into tariff-inclusive import prices), as border prices (exclusive of tariff) barely changed. In other words, U.S. importers bore the overwhelming share of the tariff incidence. This finding is documented in Amiti, Redding & Weinstein (2019), Amiti, Redding & Weinstein (2020), Fajgelbaum et al.
The subsequent US-China trade war succeeded in elevating US product prices. (Amiti, Redding, and Weinstein 2019, 2020)
Using data from 2018, a number of studies have found that recent U.S tariffs have been passed on entirely to U.S. importers and consumers.
As the firm-level tariff-inclusive price rose by 1%, exports to the U.S. decreased by 4.16% on average.
Standard estimates suggest U.S. importers bore the full incidence of the 2018 China tariffs... See, for example, Amiti, Redding, and Weinstein (2019, 2020)... ding, and Weinstein 2019, 2020) confirm the puzzle of near-complete passthrough at the border.
This analysis provides monthly updates on how actual economic indicators are responding to tariff changes, which serves as both a check on the model projections and a way to quantify the realized effects of tariffs.
We find that by December 2018, import tariffs were costing US consumers and the firms that import foreign goods an additional $3.2 billion per month in added tax costs... complete passthrough of tariffs into domestic prices.
Recent work at the border finds that tariffs are fully passed through to duty-inclusive import prices... (Amiti et al., 2019b; Fajgelbaum et al., 2020; Cavallo et al.)... complete pass-through of the 2025 tariffs to U.S. import prices, implying that prices at the border rose nearly one-for-one with applied tariff rates.
The 2019 paper by Amiti, Redding, and Weinstein, published in the Journal of Economic Perspectives, documented nearly complete pass-through of 2018 US tariffs to import prices, with regression analysis showing coefficients close to 1.0, meaning tariffs raised US import prices nearly one-for-one. This has been widely cited in economic literature as evidence that US consumers bore the full cost.
Inflation rose, with import tariffs passed on to purchases on a nearly one-for-one basis, which raised producer prices by approximately one percentage point overall.
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Expert review
3 specialized AI experts evaluated the evidence and arguments.
Expert 1 — The Logic Examiner
The logical chain from evidence to claim is direct and well-supported: Sources 1, 4, 8, 9, 14, and 22 all explicitly attribute the finding of near-complete (close to 100%) tariff pass-through to Amiti, Redding, and Weinstein (2019), and the claim's phrasing 'raised U.S. import prices nearly one-for-one' is consistent with the standard economic meaning of tariff-inclusive import prices rising proportionally with the tariff — which is precisely what the paper documents. The Opponent's argument rests on a semantic distinction between 'tariff-inclusive import prices' and 'pre-tariff border prices,' but the claim as stated ('raised U.S. import prices nearly one-for-one') is a standard shorthand for complete pass-through into duty-inclusive prices paid by U.S. importers, and Source 14 explicitly confirms this attribution to ARW (2019); the Opponent's rebuttal introduces a false precision that does not reflect how the finding is described in the literature or by the authors themselves, making the claim logically sound and well-supported.
Expert 2 — The Context Analyst
The claim omits the key definitional context that Amiti, Redding, and Weinstein (2019) estimate near-complete pass-through into tariff-inclusive prices paid by U.S. importers ("domestic prices of imported goods"), while pre-tariff border/export prices changed little—so without clarifying the price concept, readers could wrongly infer foreign exporters raised their prices one-for-one (Sources 1, 4, 8, 14). With that context restored, the core statement that ARW (2019) found tariffs raised the prices U.S. importers paid nearly one-for-one is accurate, but the framing is ambiguous enough to be misleading.
Expert 3 — The Source Auditor
High-authority, primary sources—Amiti, Redding & Weinstein's Journal of Economic Perspectives article hosted by the American Economic Association (Source 1) and the NBER working-paper version (Source 4), plus the Princeton working-paper page (Source 8)—explicitly report (near-)complete pass-through of the 2018 tariffs into the prices paid by U.S. importers for imported goods (i.e., tariff-inclusive import prices), and an independent Federal Reserve paper (Source 7) characterizes their finding as “near-complete pass-through … to US import prices.” Given that the most reliable sources consistently describe ARW (2019) as finding import prices rose nearly one-for-one with the tariff (while clarifying that pre-tariff border/export prices barely moved), the claim is substantively accurate rather than refuted by trustworthy evidence.
Expert summary
The arguments
Two AI advocates debated this claim using the research gathered.
Argument for
Source 1 (American Economic Association), the peer-reviewed publication of the study itself, explicitly states that the 2018 tariffs resulted in 'complete pass-through of the tariffs into domestic prices of imported goods,' and Source 7 (Federal Reserve) independently corroborates this by noting that Amiti, Redding, and Weinstein (2019) found 'near-complete pass-through of tariffs to US import prices,' confirming the claim is accurate. Furthermore, Sources 5 and 14 directly attribute the finding of close to 100% tariff pass-through to Amiti, Redding, and Weinstein (2019) by name, and this conclusion is consistently echoed across highly authoritative, independent sources including NBER (Source 4), Princeton University Economics (Source 8), and the AEA (Source 9), establishing overwhelming evidentiary consensus that the claim is true.
The Proponent equivocates between “domestic prices of imported goods” (a duty-inclusive price paid in the U.S.) and “U.S. import prices” as commonly understood at the border, even though Amiti, Redding, and Weinstein's own language emphasizes complete pass-through into domestic import prices (Source 1; Source 4) while other brief material notes border prices barely moved (Source 14), making “raised U.S. import prices nearly one-for-one” a misleading restatement. The Proponent's appeal to consensus is largely circular—several cited items merely paraphrase “pass-through” without preserving the crucial duty-inclusive vs. border-price distinction (Source 7; Source 9), so the argument does not actually establish that ARW (2019) found a near one-for-one increase in pre-tariff import (exporter) prices.
Argument against
The motion misstates what Amiti, Redding, and Weinstein (2019) actually quantify: their headline result is “complete pass-through … into domestic prices of imported goods” (Source 1, American Economic Association; Source 4, NBER), which is a duty-inclusive domestic import price concept, not the broader “U.S. import prices” claim as commonly understood (e.g., pre-tariff border/export prices). In fact, the brief itself repeatedly notes border prices “barely changed” (Source 14, University of Wisconsin Digital Collections) and frames the finding as incidence on U.S. importers/consumers rather than a one-for-one rise in exporters' prices, so the motion's phrasing is misleading and therefore false.
The Opponent commits a straw man fallacy by redefining 'U.S. import prices' to mean pre-tariff border prices, when the standard economic usage — and the explicit language of the claim — refers to the tariff-inclusive prices paid by U.S. importers, which is precisely what Sources 1, 4, 8, and 14 confirm rose nearly one-for-one with the tariff. The Opponent's own cited Source 14 directly states 'U.S. tariff-inclusive import prices rose by nearly the full tariff increase' and explicitly attributes this finding to 'Amiti, Redding & Weinstein (2019),' thereby confirming rather than undermining the motion.