The European Union has welcomed The Appellate Body of the WTO’s decision to rule that the United States is in breach of its WTO obligations for using "zeroing" when calculating margins of dumping. "Zeroing" is a calculation methodology which consists of ignoring cases of "negative" dumping, i.e. where the export price exceeds normal value and therefore results in an artificial increase of the dumping liability of EU exporters. This decision upholds the earlier criticism of zeroing by the WTO in 2001.