貨幣政策 失業率 - 經濟

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各位版友好,
課本寫說:
If the unemployment rate is below the natural unemployment rate, a labor shortage might put pressure on wage rates to rise, which might feed into inflation.The Fed might consider raising the federal funds rate.
If the unemployment rate is above the natural unemployment rate, a lower inflation rate is expected. The Fed might consider lowering the federal funds rate.
可是失業率不是會大於等於自然失業率嗎?
怎麼會有可能unemployment rate is below the natural unemployment rate

感謝解惑!

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All Comments

Ula avatarUla2018-06-25
因為有人會遷就現在的工作,原本應該換工作的人沒
Kumar avatarKumar2018-06-26
有換工作,失業率就會低於自然失業率
美國現在就剛好符合第一段敘述
Agatha avatarAgatha2018-06-30
實際上自然失業率難以衡量,你應該要視失業率、通
Carol avatarCarol2018-07-03
膨兩者為動態均衡