本研究主要是針對投資型年金之資產負債管理作探討，其中是就規避利率風險對於資產負債管理上的影響以及分析資產配置最適化作為研究的架構，而所利用的研究方法乃是取決於建構利率隨機模型並輔以免疫理論與Markowitz投資組合理論，以期在規避利率風險的同時，亦能將資產配置達至最佳化。 首先，為實際模擬出符合現實經濟環境變動下的隨機利率期間模型，本研究利用C.I.R利率期間結構模型來建構年金保單期間的利率結構，並且由於投資型年金之保單價值的累積特性，因此本研究同時亦建構出連接保單價值的投資資產之報酬率型態，進而模擬出各期之現金流量以及各項投資資產的存續期間；再者，藉由Markowitz投資組合理論，以在免疫條件之限制下進行最適資產配置之評估。 最後，以某知名的保險公司所推出的投資型年金商品作為本研究之實證對象，透過模擬之方法，將研究模型中之各項參數予以評估，並且根據上述之研究過程將免疫理論與投資組合理論相連接，以檢視投資型年金商品在規避利率風險的狀態下，其最適之資產配置比例是否與現行法令之規範相牴觸，而能給予適時之建議。另外，由本實證結果可知，經由本研究的分析流程，可以有效地給予年金管理者規劃出年金資產負債管理時的最適投資組合比例，並且在增加外國投資資產時，更能有效的增加年金資產之報酬，同時也不影響保險法對於投資資產的比例與總金額之限制。再者，對於探討規避利率風險前後之資產組合之資產報酬之變化時，可以進一步了解到，當年金管理者在運用免疫策略來規避利率風險時，其所面對的風險成本之多寡，以作為制定避險決策時的依據。 / This research explores the asset-liability management (ALM) for the Investment-Link-Annuity. Two aspects investigated in this research are the interest rate risk and the optimal asset allocation. Moreover, the major issue investigated here is the trade-off between the optimal investment return and the hedge of interest rate risk. We refer this trade-off as ALM cost. By using stochastic interest rate model, Immunization theory and Portfolio Selection Model, we construct an ALM model to achieve the optimal asset allocation given on hedging the interest rate risk under the immunization strategies for the insurance company. First, we utilize the public trading data for investment market in Taiwan and in USA from 1985 to 2000 and the investment-link annuity product of a well-know insurance company in Taiwan to simulate the cash flow and demonstrate the implementation of our model. By analyzing different simulations under various scenarios, the empirical results are as the followings: 1.The ALM cost for immunization strategies is very small, and is estimated to be about 1% to 2%. Therefore, we suggest that insurance companies should start to undertake the asset liability management as soon as possible. 2.If relaxing the investment restrictions of Insurance Law or allowing insurance company to invest in foreign investment market, the overall investment return will be increased and the ALM cost will be reduced effectively.

自世界上第一部成文著作權法—安妮法案 （The Statute of Anne）在1709年問世以來，著作權問題迄今仍一直是紛擾不休。著作權問題的發展一直以來跟科技的進步息息相關。而關於著作權存續期間的問題，一直是著作權領域中最富爭議性的問題之一，兩百年來，這個問題持續不斷的形成各個時代共通的難題，從不曾真正畫下句點。 德沃金是當代西方世界最富盛名的一位法哲學家之一，他提出以權利作為核心的裁判理論，試圖解決當法官在面臨沒有明確的法律條文或判例可資作為依循的困難案件時，應如何作出判決的問題。本文以美國聯邦最高法院於2003年所作成的Eldred v. Ashcroft案判決作為觀察的重點，在Eldred v. Ashcroft一案中，雙方當事人最大的爭議在於著作權存續期間的延長是否合憲？本文認為，關於著作權存續期間是否合憲的問題屬於著作權法上的困難案件。 因此，本文試圖透過德沃金所提出的裁判理論來觀察Eldred v. Ashcroft案中，美國各級法院裁判的理由構成是否建構在權利的基礎上。本文也希望從Eldred案著作權存續期間延長的爭議中，一審到三審雙方當事人與美國各級法院法官的裁判與主張，提供一個我國法院裁判時可以參考與依據的借鏡，透過外國法院與學說對於這個問題的處理，來幫助我國解決同樣的爭議，並逐步建構我國的裁判理論。

本研究的第一部份是利用有效存續期間與有效凸性來衡量人壽保險人的利率風險。我們發現Tsai (2009)指出的壽險保單準備金之有效存續期間結構並非一般化的結果。當長期利率水準高於保單預定利率及保單解約率敏感於利差時，準備金之有效存續期間會呈現與Tsai (2009)相反的結構。我們進一步發現準備金之有效凸性會亦有可能呈現負值，且不易依照保單到期期限歸納出一般化的結構。負值的有效凸性起因於準備金並非利率的單調函數，且準備金與利率的函數關係隨保單到期期限而不同。我們的研究結果可以幫助人壽保險人執行更為精確的資產負債管理。 本研究的第二部分是利用模擬最佳化的方法，幫助銷售傳統壽險保單的保險人求解出適切的業務槓桿與資產配置策略。我們假設保險人在考量破產機率與報酬率的波動之下，將資本與淨保費收入投資於資本市場中，以追求較高的業主權益報酬率。以業務槓桿與資產配置相互影響為前提，我們求解出適切的業務槓桿與多期資產配置策略，並分析在不同的業務槓桿之下，保險人多期資產配置的差異。 / In the first part of this doctoral dissertation, we focus on a proper measurement on interest rate risk of life insurer’s liabilities, policy reserves, by incorporating the general effective duration and effective convexity measures. Tsai (2009) identified a term structure of the effective durations of life insurance reserves. We find that his results are not general. When the long-run mean of interest rates is higher than the policy crediting rate and the surrender rate is sensitive to the spread, the term structure would exhibit an opposite pattern to the one in Tsai (2009). We further find that the effective convexities might be negative and the term structure of the effective convexities exhibits no general pattern. The irregularities originate from negative effective convexities result from the relationship between mean reserves and initial short rate for different years to maturity. Our results can help life insurers to implement more accurate asset-liability management. In the second part, we analyze asset allocation and leverage strategies for a life insurer selling traditional insurance products by using a simulation optimization method. We assume that an insurer invests equity capital (from its shareholders) and premiums it receives from policyholders by choosing a portfolio intended to maximize the annual return of equity minus the penalty of insolvencies and risks. We regard the leverage as an internal factor in asset allocation. Based on these assumptions, we get a promising multiple-periods asset allocation and leverage, besides analyzing how leverage affects asset allocation strategies.