本文使用1980 至2008年的季與年資料，應用(Randles et al., 1980) Triples 檢定，檢視台灣景氣循環是否存在不對稱行為並區分其不對稱形式。實證結果並無發現台灣景氣循環存在深度或除度的不對稱性。與先前文獻比較，大部分證據指出實質國內生產毛額不具除度的不對稱特徵，但存在部分深度不對稱的證據，但並非每個國家的景氣循環皆具深度不對稱的特徵。Razzak (2001) 指出對稱性是各國家景氣循環的普遍特徵，不同國家具有不同經濟結構與動態，存在不同的景氣循環特徵。相關實證結果與分析提供投資人、管理者及政策制訂者進行相關投資、管理與政策制訂上的參考。

The note applies Randles et al. 1(980) Triples test to examine the business cycle asymmetry behavior in Taiwan from 1980 to 2008. The result shows that neither deepness nor steepness asymmetry exists in Taiwan business cycle. Comparing to existing paper, most evidences indicate that no deepness asymmetry in business cycle, but few show steepness asymmetry. Razzak (2001) indicates symmetry in business cycle is the common characteristic internationally; each country has its own economic structure and dynamics, and therefore the feature of the business cycle. The empirical provides guidelines in investment, management and policy making.