開放外商進入壽險市場對本國原有壽險公司經營效率之影響

本國八家公司的市場佔率自1977年的100%到1999年的80.09%，佔率正逐年減少。本研究利用參數法中的無分配法和超越成本對數函數證明開放外商進入本國壽險市場有助於八家公司經營效率的提升。實證結果發現八家公司應增加產品的多元化及擴大經營規模，市場佔有率對於八家公司經營之影響並不明顯。最後，開放市場確實讓八家壽險公司經營績效增加。
關鍵字：人壽保險業、X-無效率、技術無效率、分配無效率、無分配估計法

The Impact of the Open Market Policy on the Efficiency of the Incumbent Insurance Companies

　　　　　　　　　　　　　　　　　　　　　　　　(Chung-Jen Hao)＊(Lin-Yhi Chou)

Using twenty-three years of data, 1977-1999, we estimate translog cost function for 8 life insurance companies. We examine the resulting coefficients to determine the relative efficiency of insurers in the sample by distribution free analysis. We then test the coefficients to see if they are related to so-called X-efficiencies because of market share, diversification products strategy and scale efficiency. Results show that the open market policy has improved incumbent life insurance company efficiency.

Keywords:life insurance industry, X-inefficiency, technology inefficiency, allocation inefficiency, distribution free approach