They believe that the frequent fluctuation of nominal and real exchange rates under the floating exchange rate regime will inevitably lead to the reduction in the volume of international trade.

他们认为，浮动汇率制度下名义汇率和实际汇率的频繁波动将不可避免地导致国际贸易量的减少。

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But in the case of goods that change in quality every year, it is much harder to split an increase in nominal ouput or spending between a change in volume and a change in price.

ECONOMIST: The numbers racket | The