The relative purchasing power parity theory postulates that______.

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问题 The relative purchasing power parity theory postulates that______.

选项 A、the equilibrium exchange rate is equal to the ratio of the price level in the two nations
B、the change in the exchange rate over a period of time should be proportional to the relative change in the price level in the two nations over the same time period
C、change in the exchange rate over a period of time should be proportional to the absolute change in the price level in the two nations over the same time period
D、the exchange rate at a period of time should be proportional to the relative prices in the two nations

答案B

解析 答案为B项。postulate“假定”。相对购买力平价理论假定,汇率变化应该等于两国通货膨胀率之差。故本题选B项。
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