平均18.3%，1934年来最高水平！美国高关税的代价是？

Group 1 - The U.S. is set to implement a new round of tariffs on various countries, including 35% on goods from Canada, 50% from Brazil, 25% from India, and 39% from Switzerland, effective August 7 [1] - The average effective tariff rate in the U.S. has reached 18.3%, the highest level since 1934 [3] Group 2 - The new U.S. tariff policy is expected to reduce trade volume as it increases costs for imported goods, leading to a decrease in exports to the U.S. from other countries [4] - The tariffs are likely to raise domestic prices of goods in the U.S., contributing to inflation, although the extent of this impact remains uncertain [4] - The U.S. is predicted to experience a decline in its position in global trade due to the establishment of high trade barriers, which will reduce trade interactions with other countries [4] - Countries heavily reliant on exports to the U.S. will face significant impacts on their trade [4] Group 3 - Historically, the U.S. has oscillated between protectionism and liberal trade policies, with current shifts being driven by perceived national interests and challenges faced by the U.S. [5] - The U.S. has reverted to protectionist policies after a long period of advocating for trade liberalization, which may be detrimental to both the U.S. and the global economy [5]