本文的目的除了介紹有關匯率目標區之研究的最新發展外,亦在既有的理論架構上,政府的匯率政策對於匯率動態以及經常帳的影響。文內考慮的政策二有,一是中心匯率的改變;另一是目標區的範圍變化。如果政府提高中心匯率,在相同的基本因子下,新的匯率水準將高於舊的水準,此外,常帳亦將因而改善。如果政府放寬目標區的幅度,既定基本因子下,新舊匯率水準執高執低將視基本因子的值而定,職是之故,經常帳的變化也將與基本因子的值息息相關,無法事前揣測了。
An introduction of target zone exchange rate theory is outlined in this paper. Two types of policy change are considered: change in the width of the band and change in the center exchange rate. The exchange rate dynamics and impacts on some endoguous variables, such as trade account, following policy changes are also discussed in the paper.