Another round of quantitative easing is a good idea for the U.S. but would not bring strong growth to the economy without help, according to The Economist. The Federal Reserve's monetary effort would need to be supplemented by short-term fiscal stimulus. That would require action by Congress. The "danger is not that the costs of" more quantitative easing "will outweigh the benefits, but that America's politicians will expect too much of it," the magazine notes.

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