US "productivity" is selling insulin that retails elsewhere in the world for $30 USD a vial for $1000 USD in the US and pocketing the difference. The US is a late stage failed capitalist society where the "market" is actually a collection of oligopolies which regularly collude to fix prices and there is limited competition. Which is why investors keep talking about moats all the time. Even agribusiness is like that with companies like Cargill controlling the market. When in any market economy agribusiness is typically highly competitive, since anyone with a plot of land can farm, the opposite is the case in the US.So it sounds like China in fact has substantially lower productivity
The US Eastern seaboard has enough population. What the US also has is a considerable aviation lobby and deep NIMBYism which is why HSR goes nowhere.The lack of HSR in the U.S. is because U.S. cities aren’t dense enough for HSR; not technological incapacity.
China built HSR to Xinjiang and they are building higher speed rail in Tibet tunneling through the world's tallest mountains connecting not so dense cities. It is all a matter of political will.
LOL.US firms like Wabtec have substantial global market share in rail rolling stock. As for 5G; U.S. firms are simply fragmented but
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