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经济学家和社会公众常常会对自由贸易产生分歧。例如,1993年,美国面临着是否要批准《北美自由贸易协定》,该协定将大大降低美国、加拿大和墨西哥之间的关税壁垒。民意测验显示公众对此分歧极大,国会最后以微弱多数予以通过。反对者认为自由贸易将危及美国的就业和生活水平。相反,经济学家却一致拥护该协定。他们认为自由贸易是提高生产分工效率和三国人民生活水平的有效途径。经济学家认为美国不断的尝试恰恰证实了自由贸易的优点。纵观美国历史,各州之间一向可以进行无限制的自由贸易,由此导致的
Economists and the general public often disagree on free trade. For example, in 1993, the United States faced the need to ratify the North American Free Trade Agreement, which would significantly reduce tariff barriers between the United States, Canada, and Mexico. Public opinion polls show that the public has a great deal of disagreement, and that Congress finally passed it with a slight majority. Opponents believe that free trade will endanger the employment and living standards of the United States. On the contrary, economists unanimously support the agreement. They believe that free trade is an effective way to increase the efficiency of production division of labor and the living standards of the people of the three countries. Economists believe that the continuous attempts of the United States precisely confirm the advantages of free trade. Throughout the history of the United States, all states have been able to carry out unlimited free trade, resulting in