China's request to retaliate against the U.S. after winning a World Trade Organization dispute over the way the U.S. calculates antidumping duties has been referred to an arbitrator, prompting a discussion at Friday's Dispute Settlement Body meeting about the DSB's role – and the continued U.S. push to block Appellate Body appointments. In May 2017, the Appellate Body said the Commerce Department had improperly used zeroing, the single rate presumption and the weighted average-to-transaction methodology in calculating targeted dumping duties...