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通貨膨脹率

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經濟學上,通貨膨脹率(Inflation rate)為物價平均水準的上升幅度(以通貨膨脹為準)。以氣球來類比,若其體積大小為物價水準,則通貨膨脹率為氣球膨脹速度。或說,通貨膨脹率為货币購買力的下降速度。

P1 為現今物價平均水準(現今的GDP平減指數), P0 為去年的物價水準(去年的GDP平減指數),年度通貨膨脹率可測量如下:

通貨膨脹率 = (P1 - P0)/P0×100%

計算通貨膨脹率有其他方法,如以P1的自然對數 減去 P0的自然對數,同樣以百分比表示。

核心通胀率(core inflation):是指消费价格指数中剔除食品和能源价格变化之后的价格变化率。

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通貨膨脹率
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