How much do tariffs reduce long-run consumption when capital adjusts?
Core argument: In a dynamic quantitative trade model where capital adjusts, U.S. long-run consumption falls by 2.6% under the April 2, 2025 tariff schedule with symmetric foreign retaliation, versus 0.6% when capital is held fixed as in a static model.
This note shows that accounting for capital adjustment is critical when analyzing the long-run effects of trade wars on real wages and consumption. The reason is that trade wars increase the relative price between investment goods and labor by taxing imported investment goods and their inputs. This price shift depresses capital demand, shrinks the long-run capital stock, and pushes down consumption and real wages compared to scenarios when capital is fixed. We illustrate this mechanism using a dynamic quantitative trade model.The US imposes tariffs on the rest of the world in line with the tariff schedule presented by the Trump administration April 2, 2025. The rest of the world retaliates by imposing symmetric import tariffs on the United States..When the capital stock is allowed to adjust, long-run consumption and wage responses are both larger and more negative. With capital adjustment, U.S. consumption can fall by 2.6%, compared to 0.6% when capital is held fixed, as in a static model. Capital capital stock adjustment emerges as a dominant driver of long-run outcomes, more important than the standard mechanisms from static trade models — terms-of-trade effects and misallocation of production across countries.

