本文使用短期Translog成本函數為估計模型，繼而利用模擬方式推估長期最適資 本量，以探討臺電於 1961-1995 年間之各種長、短期生產行為特性。 此外，因其輸配電系 統具有網路特性，因此衡量其規模經濟時，將網路變數納入分析。在國內的電業研究文獻中 ，本文首度以用戶數為網路指標，納入成本函數模型中，探討臺電之長、短期密度經濟及規 模經濟現象。 經濟以及技術與配置無效率是否存在等問題。 研究結果顯示：一、無論公營或民營銀行均有規模經濟及範圍經濟；勞動與資本二要素間， 具替代關係；而資金與前二者間則為互補關係；二、樣本銀行普遍存有經濟無效率，其中技 術無效率情況較配置無效率嚴重；三、勞動與資金配置失當造成銀行經營成本增加的程度大 致相當；四、樣本銀行的經營效率沒有隨時間經過而有明顯改善趨勢；五、銀行經營效率高 低與其生產成本（規模）大小有相當程度關係；六、民營銀行技術效率較公營行庫佳，公營 行庫則較具備配置效率。

　　　　　This paper presents empirical evidence on short-run and long-run scale economies and density economies in Taiwan Power Co. for 1961-1995. We employ the short-run equilibrium model, in which the translog variable cost function treats capital stock as a quasi-fixed factor, and number of customers as a network variable, to analyze its short-run production behavior. We further apply the simulation method to estimate the long-run optimal value of capital stock. input-specific scale results indicate considerable increasing returns. Cost complementarities among outputs are detected between financial investment and long-term loans and between short-term and loan-term loans. This implies that the estimated cost function exhibits economies of scope. Evidence is found that labor and capital are substitutes whereas deposits are complementary to labor and capital. Evidence is also found that there exists economic inefficiencies in each sample bank, and technical inefficiency is found to be more serious than allocative inefficiency on the average. The public banks have larger percentage increases in total costs resulting from technical inefficiency while allocative inefficiency causes a greater percentage increase in total costs to the private banks. In addition, technical inefficiency tends to increase with total costs through time.