In the Fall 2024 article “Assessing Trump’s New Tariff Ideas,” a data error on federal revenue from tariffs resulted in some subsequent calculation errors. The 2023 federal receipts from tariffs were $82 billion, not $72 billion, which represents 1.8% of federal revenues (not 1.6%). It follows that replacing the individual income tax by customs tariffs would require a 2,600 percent (not 2,900 percent) increase in tariff revenues. These errors all appear in the first paragraph of the article.

Later in the article, the same data error resulted in the incorrect calculation that the average US tariff levied on imported goods is 2.3 percent; the correct average is 2.6 percent. Also, Trump’s (then) proposed new tariffs would nearly triple (instead of “roughly quadrupling”) federal tariff revenues.

None of these corrected figures change the author’s argument, but he wants to correct the errors and apologize for the mistakes.