In this paper we examine the empirical relevance of three prominent endogenous protection models. Is protection for sale, or do altruistic policy makers worry about political support? We find strong evidence that protection is indeed "for sale". The important new result is, however, that not...

This paper presents new estimates of the average tariff on total and dutiable U.S. imports from 1790 to 1820. These previously unavailable series are comparable to the tariff figures available from 1821 in the Historical Statistics of the United States. These early tariffs were much lower, on...

This paper describes the updating of the NBER trade dataset, which now provides U.S. import and export values to the year 2001, disaggregated by Harmonized System (HS), Standard International Trade Classification (SITC), and the U.S. Standard Industrial Classification (SIC) categories. In...