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The incidence of tariffs on producers, in the form of lower pre-tariff prices, and consumers, in the form of higher tariff-inclusive prices, is a long-standing issue in international economics. While economic theory suggests various possibilities, empirical evidence on the distribution of tariff burdens across the supply chain, from producers through distributors to retailers, is limited.
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帕特尔指出，“美国目前国内钪产量为零，也没有在中国以外已经投产运转的替代来源”，现有库存恐怕以“月”为单位计算，而非“年”。
license: Add legal notice regarding California and Colorado bills