網際網路的發展讓人們的生活起了變化，Web2.0的概念更是增加了人們對網際網路的依賴性，我們成為網路內容的生產者、我們在社交網站上發表、追縱朋友的動態，以及取得全球世界各地的資訊。在這無限的虛擬空間中隱含的巨大商機，讓各大企業紛紛而至，因而加速了Web2.0社群網站的發展，維持與增加網站流量更是成為社群網站生存的關鍵與重要的績效指標。但社群網站該如何從流量指標之變化來評斷社群網站之績效呢?這是令我們最好奇之處。 藉由Google Analytics提供的流量分析工具，本研究蒐集了台灣四間社群網站1-3年間的流量資訊進行分析，考量蒐集之資訊具時間序列性質特性，本研究首先採用移動視窗法重新進行資料的整理，並據此概念應用在後續的統計分析。此外，本就以指數加權平均法及多元迴歸分析進行流量異常值之偵測，最後，對照各網站重大事件里程碑並與各網站業主進行一對一深訪。故本研究實際上包含質、量化之分析結果。 本篇研究四間個案網站為例，並依網站創造的服務與使用者互動情形流量將其區分為社交互動型與資訊交換型網站，並歸納其在網站流量指標上不同特徵表現及各自可參考之績效評估指標。同時，本研究採用多元迴歸分析做為社群網站績效評估模型，並企圖建構一績效評估分析流程期以做為後續研究者針對網站流量相關研究之參考。 / The development of Internet makes a great influence on human society and the development of Web2.0 enhances human’s dependence on the internet and becomes a channel of social connections. Currently, most contents of the Internet are generated by common users who could retrieve information through the entire network and trace their friends’ actions over the Social Network Sites (SNSs).Owing to the potential business opportunities on the internet, companies try to enter the market causing the prosperities of SNSs. Maintaining or even increasing traffic flows become a critical issue for SNSs to survive in the competitive market. However, how to evaluate the performance of SNSs based on traffic flow indices remains unsolved.This study collected Google Analytics data for 1-3 years from four SNSs’, respectively.Consider the time series charactics, this study applied “Moving Windows“ to organize the data for further statistical analysis.In addition, Exponentially Weighted Moving Average and Multiple Regression Analysis were used to detect the abnormal traffic flows. Finally, these abnormal records were compared with the important events and one-on-one interviewings with the SNSs operators were conducted. The results of this study are based on qualitative and quentitative analysis. This research studiesd four SNSs that were categorized into information-oriented and interaction-oriented services based on their services and users’ interaction. The SNSs at different categories behaved differently following certain characteristics defined previously.A performance evaluation process was developed as a reference for further studies.

Kyoto University (京都大学) / 0048 / 新制・論文博士 / 博士(工学) / 乙第12423号 / 論工博第4033号 / 新制||工||1480(附属図書館) / 27519 / (主査)教授 寶 馨, 教授 岡田 憲夫, 教授 角 哲也 / 学位規則第4条第2項該当

本文以2003到2006年美國上市之不動產投資信託（REITs）的資產稅賦遞延交換做研究，並用資產出售交易作為比較，觀察稅賦遞延交換對股票報酬和股利的影響，研究結果發現稅賦遞延交換對於股票報酬有負的宣告效果，然而出售資產的交易有正的且顯著的宣告效果，由於美國REITs基於稅法規定，作為免稅體，每年要以股利的形式分配百分之九十的盈餘給股東，稅賦遞延交換並不能像資產出售交易一樣帶來現金流入，因此對於未來股東的股利所得有所影響，股東對於股票報酬沒有正向的反應，但是股東會考慮稅賦遞延交換會帶來資產重配置的效率，再加上REITs通常會支付比規定還要多的股利，因此稅賦遞延交換的對於股票報酬的負影響會因此而減弱，進一步針對交易方式還有REITs股利分配進行研究，研究的結果支持稅賦遞延交換後的股利比起直接出售交易後所發放的股利還要少。本文除了研究股東對於交易宣告的反應之外，也綜觀不同資產交易方式的現金流量和REITs股利的關連性，藉此瞭解影響REITs選擇交易方式的內涵因素，以及對股票報酬和股利的影響。 / This research examines the tax deferred exchanges made by public U.S. Real Estate Investment Trusts (REITs) over 2003-2006 as well as the transactions of sell-off. The purpose of this study attempts to explore the effects of tax deferred exchange on stock returns and dividend distribution. Result of this study shows that announcement effect of tax deferred exchange is negative in stock value. On the contrary, the relationship between sell-offs and stock value is significantly positive. The reason to explain the difference on announcement effect between two types of property transaction is the specific taxable earning distribution restriction on REITs. U.S REITs have to pay out 90 % of taxable earnings in the form of dividends to their shareholders to exempt from tax. As a result, tax deferred exchange doesn’t bring cash inflow contributing to dividend increase and then shareholders react a lower stock return on tax deferred exchange than on sell-offs. However, the negative effect is weakened by the efficiency of asset reallocation and the regular dividend distribution over tax law restriction. In the analysis of dividend payment, the result of dividend examination supports the hypothesis that tax deferred exchange without cash inflow make dividend fewer than sell-offs. This study may be of importance in explaining the reaction of shareholders on tax deferred exchange of REITs’ property, as well as in providing shareholders with a better understanding of the relationship between cash flow and dividend distribution in order to clarify the cause that affect REITs to utilize different types of transaction and the factors that affect stock return and dividend.

公司治理的研究,其主要的目的是了解董事會組成,董事會規模,外部董事, 董事及CEO薪酬誘因,CEO改組,外部大股東,外國股東,機構投資人,控制權和股權集中性,併購,法律制度及執行,法源…等變數對以ROA,ROE,會計盈餘,Tobin’s Q和股市報酬率所代表的公司績效之影響。與公司治理有關的重要指標包括股份控制權,現金流量權,董監事席次的控制權,控制權與股權的偏離,次大股東,金字塔結構,交叉持股,優先投票權,外部董事比例等。 本論文共計8章40節,引述國外文獻約500篇並由國際公司治理的實證結果來探討我國五家金控：開發金、台新金、復華金、富邦金、兆豐金的公司治理,最後提出九點結論和建議。