The Economic Effects of Significant U.S. Import Restraints
http://www.usitc.gov/publications/332/pub4253.pdf
Analyzes the economic effects of removing significant U.S. import restraints, such as high tariff rates, restrictive tariff quotas, and other restrictive import policies, on the U.S. economy. Estimates that removal of all significant restraints would increase annual domestic welfare by $2.6 billion by 2015. From the U.S. International Trade Commission