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I find it interesting that we're returning to targeting unemployment at all when it's been demonstrated that these 'natural' rates of unemployment (as Friedman put it) are quite entrenched. You can only temporarily remove them with a spout of inflation and it will eventually go back to its natural rate. You'll only eventually have higher and higher inflation with the natural rate anyways (or even more unemployment if businesses can't properly plan with uneven amounts of monetary growth-see the 1970s).

What the philips curve misses, is that while lower unemployment leads to some price inflation it also slows the economy if there is no monetary growth. This is because the velocity of money will slow, thereby increasing unemployment back to the 'natural' rate. Now of course the US is increasing the money supply by a large amount, so that makes the philips curve less relevant, no? Am I missing something?

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