差異化管理對台灣與日本銀行業成本效率之影響

The Impact of Differentiated Supervision on the Cost Efficiency of Taiwanese and Japanese Banking

鄭政秉(Cheng-Ping Cheng) ； 梁連文(Lien-Wen Liang) ； 許智偉(Chih-Wei Hsu)

《應用經濟論叢》 87_S期 (2010/09) Pp. 145-189

https://doi.org/10.7086/TJAE.201009.0145

摘要

近年來，我國金融主管機關積極導入差異化管理，以自有資本適足率、逾放比率及呆帳覆蓋率等指標進行差異化管理。但此一分級管理的措施是否會提升或損及台灣銀行的效率？差異化管理對日本銀行業的衝擊及影響如何？本文利用Battese and Coelli (1995)之隨機邊界法(stochastic frontier approach, SFA) 及Battese et al. (2004) 的共同邊界法(metafrontier approach)探討實施差異化管理對我國銀行業效率之影響，並比較實施差異化管理後台灣與日本銀行業成本效率之差異。
本研究之實證結果發現：(1)實施差異化管理，銀行增加資本適足水準或降低逾放比率時，將有助於提升其成本效率。(2)差異化管理措施中，納入呆帳覆蓋率的規範(40%)，將會降低銀行的成本效率。(3)台灣實施差異化管理措施當年，會使成本無效率增加。比較差異化管理對兩國銀行的影響，無論是日本或是台灣，差異化管理措施對改善銀行業成本效率是有所助益的。由共同成本模型分析結果來分析，台灣銀行業之效率較日本銀行業爲佳。

關鍵字

金融監理 ； 隨機邊界法 ； 銀行效率 ； 差異化管理 ； 共同邊界

並列摘要

Recently, the financial authority of Taiwan has actively executed the differentiated supervision policy using the index of bank of international settlement ratio (BIS), non-performing loan ratio (NPL) and loan-loss coverage ratio as monitoring mechanism. Does the differentiated supervision policy influence cost efficiency of Taiwanese banks? Compared with Taiwan's banking, what are the different impacts of differentiated supervision policy on Japan's banking, who exploited a similar policy as Taiwan after Asia Financial Crisis in 1997? This paper uses the stochastic frontier approach (SFA) of Battese and Coelli (1995) and metafrontier approach of Battese et al. (2004) to explore the different impacts of the supervision policy on cost efficiency of Taiwanese and Japanese banks.
Our empirical results find that, after the differentiated supervision policy executed, raising capital adequacy standard or cutting non-performing loan ratio decreases the cost efficiency of both Taiwanese and Japanese banking. But for the dummy variable of the year differentiated supervision policy implemented, it increases cost inefficiency. The estimated metafrontier cost function shows that the average technology gap ratio of Taiwan's banking is higher than the one of Japan from 2004 to 2007. Overall, the performance of Taiwanese banking is better than the one of Japanese banking.

並列關鍵字

Financial Supervision ； Differentiated Supervision ； Bank Efficiency ； Stochastic Frontier Approach ； Metafrontier Approach

參考文獻

佐竹光彥、筒井義郎、湯野勉編(2003)。京都の地域金融。日本評論社。

沈中華、陳庭萱(2008)。台灣商業銀行修正呆帳提列後的成本效率實證研究。經濟論文。36，221-247。

沈中華、謝孟芬(2006)。金融業提列備抵呆帳與景氣循環、法規之關聯性分析—以49個國家爲例。財金論文叢刊。4，1-23。

林文斌(2009)。日本金融制度之變遷：當發展型國家不再「發展」。問題與研究。48，71-95。

邱永和、陳玉涓(2004)。銀行效率與獨占力之評估。亞太經濟管理評論。8，49-66。