Does currency depreciation offset tariffs enough to prevent inflation?
Core argument: The effective U.S. tariff rate on Chinese imports rose 17.9 percentage points from the start of the 2018 trade war to its 2019 maximum, while the renminbi depreciated 13.7% against the dollar, leaving after-tariff USD import prices up 4.1%.
While in principle tariffs can be noninflationary, how likely is it? In the macroeconomic data from the 2018-2019 experience, the tariffs operated pretty much as described above. The effective tariff rate on Chinese imports increased by 17.9 percentage points from the start of the trade war in 2018 to the maximum tariff rate in 2019., The Chinese renminbi depreciated against the dollar over this period by 13.7%, so that the after-tariff USD import price rose by 4.1%. In other words, the currency move offset more than three-fourths of the tariff, explaining the negligible upward pressure on inflation. Measured PCE inflation went from slightly below the Fed’s target to further below the Fed’s target. Of course there were cross-currents like the Fed’s tightening cycle at the time, but any inflation from this trade war was small enough that it was overwhelmed by these cross-currents. This explains the Trump camp’s view that the first U.S.-China trade war was noninflationary.

