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Abstract
We developed and empirically tested a differentiated products model for analyzing cargo preference legislation. Our results suggest that changes in cargo preference legislation will in aggregate have modest impacts upon the level of U.S. wheat exports, but will affect the proportions of U.S. wheat exports shipped on commercial and concessional terms. The impact on the U.S. export price of wheat depends on where the legislative changes are introduced. If the change is implemented in the market for commercial wheat sales, the U.S. export price will fall. Increased restrictions on concessional wheat sales could raise the U.S. export price of wheat.