Book excerpt: U.S. trade preference programs promote economic development in poorer nations by providing duty-free export opportunities in the U.S. The Generalized System of Preferences, Caribbean Basin Initiative, Andean Trade Preference Act, and African Growth and Opportunity Act unilaterally reduce U.S. tariffs for many products from over 130 countries. However, two of these programs expire partially or in full this year, and Congress is exploring options as it considers renewal. This testimony describes the growth in preference program imports since 1992, identifies policy trade-offs concerning these programs, and evaluates the overall U.S. approach to preference programs. Includes recommendations. Tables.