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[判断题]
购买力平价理论(purchasing power parity, PPP),解释了两个国家的价格水平变化是如何引发两种货币之间的汇率波动的。()
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汇率的购买力平价说(purchasing power parity exchange rate)
运用DD-AA模型检验外国价格水平P*短期内上升的影响。假定未来预期汇率Ee会立即与P*成比例地上升(按购买力平价理论),证明汇率也将立即对应P*的上升比例而上升。如果开始时经济处于内部平衡和外部平衡点,这一平衡点会因为P*的上升而发生改变吗?
Use the DD-AA model to examine the effects of a one-time rise in the foreign price level,P*.If the expected future exchange rate Eerises immediately in proportion to P*(in line with PPP),show that the exchange rate will also appreciate immediately in proportion to the rise in P*.If the economy is initially in internal and external balance,will its position be disturbed by such a rise in P*?