臺灣博碩士論文加值系統

本研究旨在探討台灣上市水泥類股之長期投資比率、負債比率與公司價值（Tobin’s Q）之間是否存在門檻關係。本研究之研究期間為1991 第1 季至2010 第2 季，共78 季，為一縱橫資料(Panel Data)，共選取6 家台灣上市水泥類股，作為研究對象。經過嚴謹的實證過程，得到如下的主要結論：台灣水泥業上市公司之負債比率與公司價值的關係存在單一門檻效果，當負債比率低於門檻值44.93%時，負債比率與公司價值呈現顯著正向關係，但超過門檻值時，兩者的關係則呈現顯著負相關，導致公司價值逐漸遞減。另外台灣水泥業上市公司之長期投資與公司價值之間，則存在三個門檻效果，當長期投資比率處於「小於17.23%」、「17.23%～24.43%」及「24.43%～57.86%」三區間時，長期投資比率與公司價值之間皆呈現顯著的正向關係，其中以17.23%～24.43%這個區間，長期投資比率增加時，可促進公司價值的增加最為快速。

To investigate the threshold effects among long-term investment ratio,Debt ratio,
and firm value for Taiwan Cement Listed Companies. The research period containing
78 quarters is selected from the first quarter of 1991 to the second quarter of 2010 and
the type of data is panel. Total of 6 Taiwan Cement Listed Companies are selected as
the research subjects.
Conclusively, there is one threshold effect between debt ratio and firm value. The higher debt ratio is also positively associated with firm value when the debt ratio is more than 44.93%. However, there are three threshold effects between long-term investment ratio and firm value. The higher long-term investment ratio is also significantly positively associated with firm value when the long-term investment ratios are less than 17.23%, between 17.23% and 24.43%, and between 24.43%~57.86%. The slope is bigger when the long-term investment ratio is between 17.23% and 24.43%

摘要..................ii
Abstract.............iii
致謝..................iv
目錄..................v
表目錄................vi
圖目錄................vii
第一章 緒論............1
第一節 研究動機.........1
第二節 研究目的.........2
第三節 研究背景.........3
第二章 文獻探討.........4
第三章 研究方法.........9
第四章 實證研究.........22
第五章 結論.............33
參考文獻................34

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