有的15%，有的更多？美国贸易代表这话啥意思

Group 1 - The U.S. government is preparing to increase temporary tariffs from 10% to 15% or higher on certain countries and regions, with a focus on maintaining pressure while not affecting existing trade agreements [2][3] - The Oxford Economics Institute's simulations suggest that even with a 15% global tariff, the macroeconomic impact would be minimal, but industry-level effects could be significant [3][7] - If the global tariff rate is set at 15%, it would be lower than the previous "countervailing duties" faced by certain Asian economies, which were between 19% and 20% [4][6] Group 2 - The U.S. Trade Representative indicated that the core of the new tariff plan will involve investigations under Section 301 to address unfair trade practices, particularly targeting countries that discriminate against U.S. technology companies [8][9] - The potential increase in tariffs could lead to fluctuations in actual tariff rates in the second half of the year, as the U.S. may switch between different legal provisions for imposing tariffs [7][9] - The U.S. is expected to rely more on tariffs imposed under Section 301, which allows for investigations into foreign trade practices that harm U.S. interests, as a primary source of tariff revenue [7][8]