因為在不同匯率制度下，名目匯率與相對價格可能在實質匯率的調整上扮演不同的角色，因此，探討匯率制度與購買力平價之間的關聯性是非常重要的。本文利用歐元參與國做為研究對象，樣本期間自1957年1月至2010年7月。為了避免實證結果受到計價單位的影響，本文將歐元參與國的資料轉換為成對樣本，以及為了避免橫斷面相依的問題對檢定的估計與推論產生誤差，所以本文採用已考量橫斷面相依的Pesaran (2007) Panel單根檢定方法，來探討在不同匯率制度下，購買力平價是否成立。
由本文實證結果得知，在布列敦森林制度下的固定匯率制度，支持購買力平價的證據較薄弱，而在浮動匯率制、1979年3月至1991年12月歐洲匯率機制下的釘住浮動匯率制度、以及1992年至1998年因為貨幣危機而將匯率波動區間放寬至上下15%，皆拒絕實質匯率具有單根，隱含購買力平價成立，而在歐元上路後的單一貨幣制度下，購買力平價不成立。
綜合實證結果，本文發現在固定匯率制度下，購買力平價不成立 (或者支持的證據較薄弱)，而在浮動匯率制度下，購買力平價成立，因此，本文實證結果得到購買力平價是否成立會受到匯率制度的影響。

中文書目
陳旭昇：＜時間序列分析-總體經濟與財務金融之應用＞，《東華書局》，2010年修訂版，頁44-68。
楊奕農：＜時間序列分析-經濟與財務上之應用＞，《雙葉書廊》，2009年第二版，頁235-260及頁388-392。
李榮謙：＜國際金融學＞，《智勝文化》，2009年第四版，頁305-430。

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