Numerical simulation exercises to analyze the impacts of potential changes in non-tariff policies commonly use ad valorem equivalent tariff treatment even though estimated impacts using explicit model representation and ad valorem equivalent treatments will differ. The difficulty for modellers...

If a free trade agreement (FTA) is characterized by the exchange of market access with a large and competitive trading partner, the agreement can cause a leakage of protectionist benefits to domestic industry from lobbying against external tariff cuts. This rent destruction effect of an FTA can...

The rapid growth of international retail e-commerce has drawn scrutiny to the US de minimis rule, which exempts low-value imports from tariffs. This paper analyzes how the rule shapes the small-value e-commerce trade. We examine whether tariff increases during the 2018-2019 US-China trade war...

Imports feature at all stages of production as well as in final consumption, and this is key to how tariff shocks play out. If imposed on imports in upstream sectors, import tariffs lower domestic output in downstream sectors; if imposed downstream, they raise upstream production. The aggregate...

On April 2, 2025, President Trump declared "Liberation Day", announcing broad tariffs to reduce trade deficits and revive U.S. industry. We analyze the long-term economic impacts of these tariffs through the lens of a trade model that features flexible tariff passthrough and endogenous trade...

During the U.S.-China trade war, the U.S. punitive tariffs were almost entirely borne by U.S. importers. In contrast, only 68% of China's retaliatory tariffs were paid by Chinese importers. The puzzling difference between the U.S. and China is mainly driven by their different import structures...

This paper presents a new methodology to detect corruption in customs and applies it to Madagascar’s main port. Manipulation of assignment of import declarations to inspectors is identified by measuring deviations from random assignment prescribed by official rules. Deviant declarations are...

We study, theoretically and empirically, how countries choose intra-bloc tariffs and preferential margins when they form Preferential Trade Agreements (PTAs). Our model indicates that countries should set systematically lower preferential margins when the bloc takes the form of a free trade area...

Tariff reductions have gender-specific effects on the labor market that change the relative bargaining power within households, which in turn affects child outcomes. We estimate how changes in parental labor supply due to these tariff reductions affect child schooling by focusing on young...

President Bush imposed safeguard tariffs on steel in early 2002. Using US input-output tables and a generalized difference-in-difference methodology, we analyze the local labor market employment effects of these tariffs depending on the local labor market's reliance on steel as an input and as...