[webinarian]

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China has already lost its market economy status in WTO last year.  This means that the US,  European Unions,  Australia, Japan, and the other US Alliances can slam additional tariffs on the Chinese products and goods without worrying that China will make a noise.
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What is the use of tariff when 90% is borne by importers? 

US consumers pay for it. It is inflation for own economy.

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