中文摘要 中國大陸的金融業以引進外資是否可以改善盈餘管理是一個重要的研究議題，過去的文獻對此議題的研究結果並無一致性的看法。本文探討過去文獻上所使用的研究方法可能產生估計上的選擇偏誤，並提出以傾向分數配對方法(Propensity Score Matching Method)將樣本重新配對，以解決選擇偏誤的問題，並重新估計引入外資對改善盈餘的影響。首先，本文將所有資料分成兩組，試驗組(外資入股銀行)與控制組(外資沒入股銀行)並分別對其計算盈餘管理的統計量，發現不論是試驗組(外資入股銀行)或是控制組(外資沒入股銀行)均有盈餘管理現象，而控制組(外資沒入股銀行)的盈餘管理現象更較試驗組(外資入股銀行)嚴重的多，因此根據本文的實證結果本文初步的判斷外資入股會改善盈餘管理現象。然而，根據本文的實證研究，本文發現試驗組(外資入股銀行)與控制組(外資沒入股銀行)之後在樣本配對前，影響銀行從事盈餘管理行為的特性變數在兩樣本之間存在著顯著差異，而唯有透過配對方法篩選樣本後才減少了這個差異，而利用配對之後的樣本作分析，本文發現，平均來說，銀行引進外資的確會降低銀行從事盈餘管理的程度。

近年來，由於經濟體逐漸轉制和對外開放，中國大陸銀行業也逐漸接受全球化帶來的衝擊。然而外資進入對中國大陸銀行的績效究竟有無正向效果，各學者看法不一；在此議題上，過去的研究多限於法理推論或因中國大陸資料難以蒐集，並未能有完善的科學結果。本文即在探討中國大陸的城市銀行在外資參股後其績效是否優於其他城市銀行，綜合銀監會資料與Bankscope 資料庫，整理中國大陸111家城市銀行2004-2006年的財務資料，利用Rubin(1973)提出的配對理論(Matching Theory)檢驗外資是否能提升銀行競爭力。結果顯示外資參股的中國大陸城市銀行在淨利、不良貸款比率以及資本適足率三項指標上表現較佳，特定情況下外資參股的城市銀行在資產報酬率也有較佳的表現；但股東權益報酬率差異則不顯著。

本研究使用固守職位理論(Entrenchment theory)解釋在經理人更替後因風格不同及代理人問題造成繼任者有現金持有動機的轉換，此項交乘效果將造成公司現金持有決策的轉變。同時本研究使用多角化公司的財務決策轉變作為例子，解釋在能力配對理論(Ability-matching theory)中不同公司性質造成CEO更替之後決策轉變的原因。研究結果顯示在兩種理論之下，被強制替換或自動離職的狀況將會帶來經理人風格轉變、前任代理人問題減輕或在公司狀況不同下使得現金持有因素有顯著的增減。然而整體實證結果因增減效果彼此抵消，CEO更替對於現金持有的影響並不顯著。 / Our research used entrenchment theory to explain the changing in cash holding after CEO turnover can be caused by different managerial style and agency problem. The interaction of turnover and entrenchment effect will transform motivations of holding cash and further changing the liquidity policy. Meanwhile, we used the ability-matching theory to explain the changing of financial decision in diversified companies to show how different company characteristics affect corporate financial strategy after CEO turnover. Our results showed that based on the two theory, CEO characteristics, agency problem and firm characteristic will significantly affect the financial variables. However, the total effect of CEO turnover on cash holding policy is insignificant because the different effects off set the total effect.

本篇論文應用Rubin (1973)、Rosenbaum and Rubin (1983、1985a,b)所發展的配對方法(Matching Method)探討兩個議題，其一是評估企業從事社會責任行為是否可以改善績效，另一則是探討銀行加入金控後對其績效的影響。 / 針對第一個議題，我們將FTSE All-share 指數中被收錄於英國FTSE 社會責任指數的成份股定義為社會責任企業，未被收錄者定義為非社會責任企業，應用配對方法，根據特性變數是否相近為依據進行樣本配對。實證結果發現，不論使用配對前或是配對後的樣本進行分析，皆找不到社會責任企業的平均績效優於非社會責任企業的證據；相反地，部分的證據顯示社會責任企業的財務績效相對較低，因此我們的分析結果傾向支持焦點移轉假說，社會責任行為對財務績效的影響效果為負。 / 另外，我們以遠見雜誌於2006 年公佈的企業社會責任調查為基礎，將衡量企業社會責任績效的三個層面－社區參與、環境保護與財務透明，透過投資組合分析與迴歸分析來評估公司承擔社會責任與財務績效之間的關聯性。實證結果發現，第一，平均來說，公司的社會責任評分愈高，在評比結果公佈後的股票報酬愈低，兩者之間呈現負向關係；第二，公司在不同層面的社會責任行為對於股價報酬的影響具有差異性；第三、透過公司的長期財務資料發現，社會責任評分高的公司其長期平均會計績效相對較佳，但長期平均的股票報酬相對較低，表示社會責任型公司不一定是一個好的投資標的；最後，我們找不到支持社會責任行為可以做為公司績效保險的證據。本文使用各別層面的評比指標，更廣泛地評估社會責任行為對財務績效的影響，改進既有文獻中僅使用單一指標的不足之處。 / 就第二個議題而言，同樣地應用配對方法，根據銀行的特性變數是否相近為依據進行樣本篩選，利用台灣上市上櫃的銀行在2002 年第1 季至2006 年第2季的資料，我們發現在樣本配對前，平均來說，金控銀行在15 個CAMEL 績效指標的表現上皆相對較佳；樣本配對後，金控銀行除了在費用比率之外，其他的評比指標仍相對優於獨立銀行；不論使用配對前或配對後的樣本做分析，皆未出現金控銀行績效顯著較差的證據，因此，我們的實證結果偏向支持綜效假設，銀行加入金控對績效的影響效果為正向。 / 我們的研究架構與方案評估與政策衝擊分析文獻中的方法相一致，而貢獻則在於我們考慮樣本之間特性變數的差異性，進而以樣本配對的方式修正這個差異性，將有效降低既有文獻中在檢驗上述兩個議題上的選擇偏誤問題。 / In this thesis, we apply several matching methods, develop by Rubin (1973)、Rosenbaum and Rubin (1983, 1985a,b), on examing the effects of Corporate Social Responsibility (CSR) on firm financial performance (CSR-effect) and on evaluating the effects of banks being subordinated to FHC on CAMEL indicators (join-FHC effect). / For the former application, two competing hypotheses, social impact hypothesis and shift of focus hypothesis, are proposed, where the former suggests that CSR has a positive relation with performance and the latter are opposite. To ensure the CSR-effect is not contaminated by other factors or the sample is randomly drawn, we employ four matching methods, Nearest, Caliper, Mahala and Mahala Caliper to match the characteristics of the firms with CSR (CSR-firms) and without CSR (NonCSR-firms) to get rid of sample selection bias. Although the four methods yield slightly different results, to our surprised, firms engaging in CSR activities obtain lower values on the return on assets, return on equity, return on sales and earnings per share. Therefore, CSR at the very least does not improve the firm performance, supporting the shift of focus hypothesis. Engaging in CSR activities lead to more pain than gain, at least in the short run. / On the CSR topic, using a set of disaggregated social performance indicators for community participation, environmental protection and fiancail transparency from the Global Views Monthly, we examine the relationship between CSR and financial performance of TSE listing companies. Our main results show that first, scores on composite social performance indicators are negatively related to stock returns and this relationship cannot be rationalized by multi-factor models for explaining the cross-sectional variation in stock returns. Second, the effects of three disaggregated social performance indicators on stock returns are differenct among industries. Third, aggregated social performance indicator is positively related to long-term accounting performance but negatively related to long-term market performance, and thus implies that good companies are good in books, but not good investments. Finally, firms with high CSR ratings do no exhibit smaller decline of their financial performance during stagnations and thus not support the view that CSR is insurance of financial performance. / The second application, two hypotheses, synergy hypothesis and specialization advantage hypothesis, are raised too, where the former suggests that FHC-banks performer better and the latter are contrary. Above four matching methods are still used to fix the characteristics of two groups of banks in order to correct for sample selection bias. Based on after-matching samples, most of our empirical results suggest that FHC-banks, on average, outperform independent banks on most of indicators on capital adequacy, asset quality, earning ability and liquidity but not on management ability and being FHC-banks at the very least does not deteriorate the performance of banks, making our conclusion favors the synergy hypothesis and against specialization advantage hypothesis in Taiwan. / Our framework is identical to many applications of matching method such as Persson (2001), Hutchison (2004), Glick, Guo and Hutchison (2006), and are also parallel to standard medical and biological research.