然而经济学家的共识是，过去三十年来，美国制造业就业的流失约有80％是由节约劳动力及提高生产率的技术变革导致的，而贸易的影响只能远远地屈居第二。
Among economists, however, the consensus is that about 80% of the loss in US manufacturing jobs over the last three decades was a result of labor-saving and productivity-enhancing technological change, with trade coming a distant second.