This paper examines recent trends in the US antidumping process. We trace the experience of different groups of countries at each stage of the investigation process and through follow-up activity in disputes initiated at the GATT/WTO. The data reveal that lower income developing countries are more likely to be targeted, less likely to settle cases, more likely to confront high dumping duties, and less likely to bring cases to the WTO. We argue that differences in administrative and institutional ‘capacity’ may be a contributing factor that explains the observed bias facing developing countries, in addition to the other hypotheses that have been offered in the literature, such as higher protection and limited retaliatory ability.