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    Title: 信用違約機率之預測─Robust Logitstic Regression
    Authors: 林公韻
    Lin,Kung-yun
    Contributors: 沈中華
    Shen,Chung-hua
    林公韻
    Lin,Kung-yun
    Keywords: 違約機率
    羅吉斯模型
    穩健迴歸
    羅吉斯穩健迴歸
    營收品質
    信用風險模型效力驗證
    Probability of Default (PD)
    Logistic Model
    Robust Regression
    Robust Logistic Regression
    Quality of Revenue
    Validation Methodologies for Default Risk Models
    Date: 2004
    Issue Date: 2009-09-17 19:06:49 (UTC+8)
    Abstract: 本研究所使用違約機率(Probability of Default, 以下簡稱PD)的預測方法為Robust Logistic Regression(穩健羅吉斯迴歸),本研究發展且應用這個方法是基於下列兩個觀察:1. 極端值常常出現在橫剖面資料,而且對於實證結果往往有很大地影響,因而極端值必須要被謹慎處理。2. 當使用Logit Model(羅吉斯模型)估計違約率時,卻忽略極端值。試圖不讓資料中的極端值對估計結果產生重大的影響,進而提升預測的準確性,是本研究使用Logit Model並混合Robust Regression(穩健迴歸)的目的所在,而本研究是第一篇使用Robust Logistic Regression來進行PD預測的研究。
    變數的選取上,本研究使用Z-SCORE模型中的變數,此外,在考慮公司的營收品質之下,亦針對公司的應收帳款週轉率而對相關變數做了調整。
    本研究使用了一些信用風險模型效力驗證的方法來比較模型預測效力的優劣,本研究的實證結果為:針對樣本內資料,使用Robust Logistic Regression對於整個模型的預測效力的確有提升的效果;當營收品質成為模型變數的考量因素後,能讓模型有較高的預測效力。最後,本研究亦提出了一些重要的未來研究建議,以供後續的研究作為參考。
    The method implemented in PD calculation in this study is “Robust Logistic Regression”. We implement this method based on two reasons: 1. In panel data, outliers usually exist and they may seriously influence the empirical results. 2. In Logistic Model, outliers are not taken into consideration. The main purpose of implementing “Robust Logistic Regression” in this study is: eliminate the effects caused by the outliers in the data and improve the predictive ability. This study is the first study to implement “Robust Logistic Regression” in PD calculation.
    The same variables as those in Z-SCORE model are selected in this study. Furthermore, the quality of the revenue in a company is also considered. Therefore, we adjust the related variables with the company’s accounts receivable turnover ratio.
    Some validation methodologies for default risk models are used in this study. The empirical results of this study show that: In accordance with the in-sample data, implementing “Robust Logistic Regression” in PD calculation indeed improves the predictive ability. Besides, using the adjusted variables can also improve the predictive ability. In the end of this study, some important suggestions are given for the subsequent studies.
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    二、中文部分
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    3. 江欣怡(2003),「企業危機預警模型在台灣的應用與比較」,東吳大學國際貿易學系研究所碩士論文。
    4. 何太山(1977),「運用區別分析建立商業放款信用評分制度」,政治大學企業管理研究所未碩士論文。
    5. 周培如(2004),「銀行危機預警指標-KMV信用風險模型與財務指標之應用」,國立政治大學經濟學系研究所碩士論文。
    6. 吳念芳(2003),「從銀行借款資訊探討公司財務危機」,國立高雄第一科技大學財務管理研究所碩士論文。
    7. 邱順南(2003),「台灣銀行業金融預警模型之探討」,嶺東技術學院財務金融研究所碩士論文。
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    9. 林宓穎(2001),「上市公司財務危機預警模式之研究」,國立政治大學財政學系研究所碩士論文。
    10. 林鴻傑(1996),「建立企業財務危機預警模型之研究-以台灣地區紡織業股票上市公司為例」,大葉大學事業經營研究所碩士論文。
    11. 卓怡如(1995),「財務危機預警模型之建立-以上市及未上市公司為例」,台灣大學財務金融研究所碩士論文。
    12. 陳建賓(2003),「加入公司治理指標的企業財務危機預測研究:Logistic 模型的應用」,淡江大學財務金融學系研究所碩士論文。
    13. 陳明賢(1985),「財務危機預測之計量分析研究」,台灣大學商學研究所碩士論文。
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    22. 潘玉葉(1990),「台灣股票上市公司財務危機預警分析」,淡江大學管理科學研究所博士論文。
    Description: 碩士
    國立政治大學
    金融研究所
    92352009
    93
    Source URI: http://thesis.lib.nccu.edu.tw/record/#G0923520091
    Data Type: thesis
    Appears in Collections:[Department of Money and Banking] Theses

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