sharply reduced physical inspections of import shipments. An estimation strategy that isolates quasi-random variation in the … allocation of shipments to physical inspections is used to show that reduced inspections significantly increase imports. Import … revenues collected at the border rise in direct proportion to growth in declared import value. There is no compelling evidence …

We estimate the macroeconomic effects of import tariffs and trade policy uncertainty in the United States, combining … depress trade, investment, and output persistently. The general equilibrium import elasticity is -0.8. Historically, NAFTA …