研究限制

一、衡量銀行放款組合多角化指標眾多，例如銀行授信資產可依產業、部門、國家 別來分類，然而銀行對上述相關資料之揭露不完整，因此僅以放款類型來計算放款多角 化程度，未來希望可以突破資料上的不足及限制，以探討不同放款多角化指標對銀行經 營績效之影響。

二、由於信用卡循環信用餘額之資料揭露始於2004 年，所以本文之研究期間為 2004 到 2007 共四年，時間上稍嫌過短，未來可將時間拉長，以更完善了解多角化經營與銀 行利潤、風險之關係。

參考文獻

Acharya, V., I. Hasan, and A. Saunders (2006). "Should Banks be Diversified? Evidence from Individual Bank Loan Portfolios." Journal of Business 79(3): 1355-1413.

Altman, Edward I.(1968). "Financial Ratios, Discriminant Analysis and the Prediction of Corporate Bankruptcy." Journal of Finance 23(4):589-609.

Barth, J.R., G. Caprio, and R. Levine (1998). "Financial Regulation and Performamce:

Cross-Country Evidence," The World Bank Working Paper, No, 2037.

Barth, J.R., G. Caprio, and R. Levine (2000). "Banking Systems around the Globe: Do Regulation and Ownership Affect Performance and Stability?" The World Bank Working Paper, No. 2325.

Demsetz, R.S., and P.E. Strahan (1997). "Diversification, Size, and Risk at Bank Holding Companies." Journal of Money, Credit and Banking 29(3):300-313.

Diamond, D. (1984). "Financial Intermediation and Delegated Monitoring."Review of Economic Studies 59: 393-414.

DeYoung, R., and K.R. Roland (2001). "Product Mix and Earnings Volatility at Commercial Banks: Evidence From a Degree of Total Leverage Model." Journal of Financial Intermediation 10: 54-84.

D'Souza, C., and A. Lai (2003). "Does Diversification Improve Bank Efficiency?"

Proceedings of 2003 Conference, Bank of Canada.

Emmons, W.R., R.A. Gilbert, and T.J. Yeager (2004). "Reducing the Risk at Small Community Banks: Is it Size or Geographic Diversification that Matters?" Journal of Financial Services Research 25(2/3): 259.

Gallo, J.G., V.P. Apilado, and J.W. Kolari (1996). "Commercial Bank Mutual Fund Activities: Implications for Bank Risk and Profitability." Journal of Banking and Finance 20: 1775-1791.

Gehrig, T. (1998). "Screening, Cross-Border Banking, and the Allocation of Credit."

Research in Economics 52: 387-407.

Hauswald, R., and R. Marquez (2006). "Competition and Strategic Information Acquisition in Credit Markets." The Review of Financial Studies 19(3): 968-1000.

Hayden, E., D. Porath, and N.V. Westernhagen (2006). "Does Diversification Improve the Performance of German Banks? Evidence from Individual Bank Loan Portfolios."

Discussion Paper Series 2: Banking and Financial Studies.

Iannotta, G. (2006). "Testing for Opaqueness in the European Banking Industry: Evidence from Bond Credit Ratings." Journal of Financial Services Research 30: 287-309.

Iannotta, G., G. Nocera, and A. Sironi (2007). "Ownership Structure, Risk and

2127-2149.

Kwast, M. L. (1989). "The Impact of Underwriting and Dealing on Bank Returns and Risks." Journal of Banking and Finance 13 (1): 101-125.

Kwan, S. H. (1997). "Securities Activities by Commercial Banking Firms’ Section 20 Subsidiaries: Risk, Return, and Diversification Benefits," Federal Reserve Bank of San Francisco Working Papers, No. 98-10.

Lepetit, L., E. Nys, P. Rous, and A. Tarazi (2006). "Product Diversification in the European Banking Industry:Risk and Loan Pricing Implications." Working Paper, University of Limoges

Lown, C.S., C.L. Osler, P.E. Strahan, and A. Sufi (2000). "The Changing Landscape of the Financial Services Industry: What Lies Ahead?” Federal Reserve Bank of New York, Economic Policy Review 6(4):39–54.

Marquardt, D. W. (1970). "Generalized Inverses, Ridge Regression, Biased Linear Estimation and Nonlinear Estimation. " Technometrics, 15, 591-612.

Mercieca, S., K. Schaeck, and S. Wolfe (2007). "Small European Banks: Benefits from Diversification?" Journal of Banking & Finance 31: 1975-1998.

Milbourn, T.T., A.W.A. Boot, and A.V. Thakor (1999). "Megamergers and Expanded Scope: Theories of Bank Size and Activity Diversity." Journal of Banking and Finance 23: 195-214.

McAllister, P.H., and D.A. McManus (1993). "Resolving the Scale Efficiency Puzzle in Banking." Journal of Banking and Finance 17: 389-405.

Pilloff, S.J., and S.A. Rhoades (2000). "Do Large, Diversified Banking Organizations Have Competitive Advantages?" Review of Industrial Organization 16: 287–302.

Sinkey, Jr., F. Joseph, and R.C. Nash (1993). "Assessing the Riskiness and Profitability of Credit-Card Banks." Journal of Financial Services Research 7 (2): 127-150.

Smith, R., C. Staikouras, and G. Wood (2003). "Non-Interest Income and Total Income Stability." Working Paper n°198- Bank of England.

Stiroh, K. J. (2004a). "Diversification in Banking: Is Noninterest Income the Answer."

Journal of Money, Credit, and Banking 36(5): 853-882.

Stiroh, K. J. (2004b). "Do Community Banks Benefit from Diversification?." Journal of Financial Services Research 25(2/3): 135–160.

Stiroh, K. J. (2005). "Bank Risk and Revenue Diversification:An Assessment of Using Equity Returns." Working Paper, Federal Reserve Bank of New York

Stiroh, K., and A. Rumble (2006). "The Dark Side of Diversification: The Case of US Financial Holding Companies." Journal of Banking and Finance 30(8): 2131-2432.

Stiroh, K. J. (2006). "A Portfolio View of Banking with Interest and Noninterest

Activities." Journal of Money, Credit, and Banking 38(5): 1352-1361.

Shen, C., and Y. Chang (2002). "Do Regulation and Ownership Affect Bank Performances?

Governance May Mater" Taiwan Economic Review 30(3)：277-310.

Winton, A. (1999). "Don't Put All Your Eggs in One Basket? Diversification and Specialization in Lending." Working Paper, University of Minnesota.

附錄 A：樣本分類之變數敘述統計表

表 A-1 變數敘述統計表(樣本為非金融控股公司銀行)

平均值 標準差 最小值 最大值 樣本數 資產報酬率(ROA) -0.0001 0.0071 -0.0299 0.0171 96 股東權益報酬(ROE) -0.0283 0.1476 -0.8016 0.1810 96 風險調整的資產報酬率(RAROA) 2.8077 7.0025 -2.0923 44.1144 96 風險調整的股東權益報酬(RAROE) 2.8449 6.7251 -2.0462 36.6176 96 淨利息邊際(NIM) 0.0208 0.0126 0.0011 0.0698 96 倒閉風險(Z-score) 57.9887 134.0520 0.3862 853.2010 96 逾放比率(NPL) 0.0326 0.0294 0.0097 0.1972 96 備抵呆帳比率(LLP) 0.0132 0.0093 0.0041 0.0609 96 收入來源多角化(RHI) 0.4027 0.0998 0.0713 0.5000 96 放款組合多角化(LHI) 0.6261 0.0389 0.4985 0.6836 96 股東權益比率(E/A)(%) 6.0791 2.3205 2.7049 17.8378 96 銀行規模(SIZE)(百萬) 12.7589 0.9979 10.8648 14.9821 96 銀行規模成長率(SIZEG) 0.0645 0.1079 -0.2307 0.4739 96 實質經濟成長率(GDPG)(%) 5.2490 0.7959 4.1606 6.1532 96

表 A-2 變數敘述統計表(樣本為金融控股公司銀行)

平均值 標準差 最小值 最大值 樣本數 資產報酬率(ROA) 0.0034 0.0086 -1.6181 6.4003 50 股東權益報酬(ROE) 0.0303 0.1645 -2.1099 8.2068 50 風險調整的資產報酬率(RAROA) 3.3681 5.5978 2.0012 6.4954 50 風險調整的股東權益報酬(RAROE) 3.8669 7.5987 2.7680 10.5524 50 淨利息邊際(NIM) 0.0207 0.0088 1.2287 4.4222 50 倒閉風險(Z-score) 31.1665 39.4155 1.8287 5.9184 50 逾放比率(NPL) 0.0184 0.0099 1.5682 5.7651 50 備抵呆帳比率(LLP) 0.0104 0.0044 1.3064 4.7872 50 收入來源多角化(RHI) 0.4315 0.0751 -1.0400 2.9859 50 放款組合多角化(LHI) 0.6245 0.0385 -0.4943 2.2286 50 股東權益比率(E/A)(%) 6.3057 1.7715 1.2765 4.6153 50 銀行規模(SIZE)(百萬) 13.5806 0.7192 -0.7217 2.8405 50 銀行規模成長率(SIZEG) 0.1395 0.1773 2.0788 8.8707 50 實質經濟成長率(GDPG)(%) 5.2216 0.7818 -0.1789 1.4762 50

表 A-3 變數敘述統計表(樣本為大銀行)

平均值 標準差 最小值 最大值 樣本數 資產報酬率(ROA) 0.0031 0.0061 -0.0107 0.0139 39 股東權益報酬(ROE) 0.0368 0.1265 -0.2834 0.1885 39 風險調整的資產報酬率(RAROA) 4.4309 6.0178 -0.8885 23.3529 39 風險調整的股東權益報酬(RAROE) 4.8203 8.2489 -0.8421 36.7352 39 淨利息邊際(NIM) 0.0149 0.0087 0.0011 0.0450 39 倒閉風險(Z-score) 48.6531 52.3737 1.7476 173.4690 39 逾放比率(NPL) 0.0180 0.0088 0.0050 0.0473 39 備抵呆帳比率(LLP) 0.0108 0.0041 0.0063 0.0244 39 收入來源多角化(RHI) 0.4241 0.1094 0.0713 0.5000 39 放款組合多角化(LHI) 0.6424 0.0193 0.6058 0.6820 39 股東權益比率(E/A)(%) 5.6525 1.5337 2.7049 8.3372 39 銀行規模(SIZE)(百萬) 14.3187 0.3019 13.5620 14.9821 39 銀行規模成長率(SIZEG) 0.0778 0.0993 -0.0308 0.4626 39 實質經濟成長率(GDPG)(%) 5.2447 0.7915 4.1606 6.1532 39

表 A-4 變數敘述統計表(樣本為小銀行)

平均值 標準差 最小值 最大值 樣本數 資產報酬率(ROA) -0.0017 0.0074 -2.4510 8.8036 35 股東權益報酬(ROE) -0.0511 0.1834 -2.9222 11.2508 35 風險調整的資產報酬率(RAROA) 3.5723 10.1156 2.9869 10.9010 35 風險調整的股東權益報酬(RAROE) 2.3644 6.2731 2.8863 10.8869 35 淨利息邊際(NIM) 0.0225 0.0125 1.4934 3.7690 35 倒閉風險(Z-score) 85.4321 197.0230 2.9555 10.6345 35 逾放比率(NPL) 0.0406 0.0346 2.1438 6.9795 35 備抵呆帳比率(LLP) 0.0148 0.0108 2.2571 7.3885 35 收入來源多角化(RHI) 0.3950 0.1033 -1.4266 4.9486 35 放款組合多角化(LHI) 0.6154 0.0419 -0.5669 2.7863 35 股東權益比率(E/A)(%) 6.3607 2.2251 2.6451 11.1243 35 銀行規模(SIZE)(百萬) 11.8264 0.4132 -0.3648 2.2863 35 銀行規模成長率(SIZEG) 0.0463 0.1038 0.1865 2.6887 35 實質經濟成長率(GDPG)(%) 5.2470 0.7947 -0.2196 1.4551 35