This survey reviews the broad changes in U.S. trade policy over the course of the nation's history. Import tariffs have been the main instrument of trade policy and have had three main purposes: to raise revenue for the government, to restrict imports and protect domestic producers from foreign...

This paper calculates the Anderson-Neary (2005) trade restrictiveness index (TRI) for the United States using nearly a century of data. The results show that the standard import-weighted average tariff understates the TRI, defined as the uniform tariff that yields the same welfare loss as the...