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But these rigidities should not be overestimated .

但这些阻力也不应高估。

In this view , the only things now holding economies back are structural rigidities and policy-induced uncertainties .

这种观点认为，眼下拖累经济的因素唯有结构性僵化和由政策导致的不确定性。

He argues they are familiar with the u. s.economy , where foreign trade makes up a small proportion of economic output and where there are what he calls ' long-lasting nominal rigidities ' .

他辩称，他们熟悉美国经济，而美国的经济中外贸只占经济产值的一小部分，而且还有他所说的“为时已久的名义刚性（nominalrigidities）”。