產業損害認定的相關法規裏，明確指出廠商生產力變化是衡量產業損害成立與否的重要因素之一。然而，目前國內現有的反傾銷調查案例中，卻嚴重忽略這個指標，且對生產力的評估方式較不嚴謹。再者，國內這方面的文獻仍極度缺乏。因此，本研究選取國內反傾銷案例最多的產業-鋼鐵業為研究對象，利用麥氏 (Malmquist)生產力指數來評估廠商生產力。實證結果發現，傾銷不一定不利於國內產業，且反傾銷調查確實會保護提控產業。最後，課徵反傾銷稅有利於提控廠商，但不利於下游相關企業，故政府在課徵反傾銷稅時應多考量整體社會福利。 According to the related trade laws in Taiwan, it is clearly indicated that variation in domestic corporate productivity is one of the crucial factors to determine whether the domestic industry had hurt by imported goods.Nevertheless, this element has been largely ignored in previous anti-dumping investigations in Taiwan, and the way to assess productivity is not strict enough in practice. In addition, the relevant literature in Taiwan is still insufficient. Therefore, steel sector, which accounts for most anti-dumping cases in Taiwan, is selected as the subject of this work. Malmquist Productivity Index is employed to estimate corporate productivity. The empirical evidences show that dumping will not definitely hurt all domestic industry whereas anti-dumping investigation might protect the filing sectors. Consequently, anti-dumping duty will benefit the filing corporations, but impair the related downstream industries. Thus, the government should take social welfare into consideration in determining the imposition of anti-dumping duty.
