This approach would be politically sensible to put pressure on the American administration but economically inept that few reasonable countries would allow it in practice despite the nonsense coming out of some politicians’ mouths. The reason is because dumping of products can have negative impact on the local industry (i.e. prices, jobs and livelihoods) and we have seen this effect with steel where UK steel has struggled to compete because of accusations of China steel dumping activities.
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China's steel industry faces concerns about "dumping," where it
exports steel at prices below domestic costs, potentially harming global steel producers, leading to increased anti-dumping investigations and tariffs.
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What is laughable about the global discourse is that many countries know that the rest of the world are full of s***. They play the same games whilst pretending not to do so. As a result, it is only the Americans that can tolerate the BS.
We can apply a scenario without the US. So the US has applied 25% car import tariffs on the rest of the world. Europe and other regions then choose to do business with each other excluding the Americans. So the Europeans try to sell their cars to Asia whilst at the same time, the Asians (Koreans, Chinese, Japanese etc) want to do the same.
Without American demand, the Asians want to enter the EU market, but we know the EU are protectionist, so they keep their 20% tariffs. The Chinese, Japanese, Koreans are also protectionists, so they keep their own barriers and tariffs to protect local industry.
What would be the resulting effect? Well, the Chinese could win that battle because they would mobilise their large workforce to manage their costs down and pump out volume that outcompetes other rivals. This means that other countries or car brands wont be able to compete on price despite the tariffs.
A mini showcase currently exists with German car manufacturers complaining about the level of competitiveness with other countries especially China.
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German car manufacturers are facing a crisis due to rising production costs, including energy prices and labor costs, which threaten their competitiveness and the future of the industry.
For decades, car-making has been the jewel in Germany's industrial crown, a powerful symbol of the country's famous post-war economic miracle. Its "Big Three" brands, Volkswagen, Mercedes-Benz, and BMW, have long been praised for their performance, innovation and precision engineering. But today, the German motor industry is struggling.
https://www.bbc.co.uk/news/articles/cz6pzwj6qq7o••••••••••••
I am not an expert on trade but I suspect that the American master planners know what they are doing with the trade tariffs and probably understand that they have bankrolled the world for decades and it wont survive without them.