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In order to encourage the establishment of financial holdings' subsidiaries, the Taiwan government promulgated the "Financial Institutions Merger Law" in 2000 and the "Financial Holding Company Law" in 2001. The implementation of the laws relaxed the restrictions on cross-industry operations of financial institutions. After the establishment of financial holdings' subsidiaries, Taiwan's banking industry has entered a stable development period. However, the financial crisis in 2008 strongly frustrated the global financial industry. The Central Bank of the Republic of China’s interest rates have become low since 2008. With interest rates falling, banks can no longer make high profits from traditional credit and savings businesses. The leading banks needs to change their business models to compensate the loss caused by low profits. In order to study the impact of 15 financial holding subsidiary banks in Taiwan from 2015 to 2017, this thesis uses the CCR model and the BCC model of the data envelopment analysis method (DEA), sensitivity analysis, and Tobit regression analysis to do the analysis. The results as below: 1. The analysis results of the CCR model shows that Taipei Fubon Bank, Hua Nan Bank, Chinatrust Bank, Mega Bank, First Bank, Taishin Bank and Taiwan Bank all had an efficiency value of 1 from 2015 to 2017, which is an overall Technical efficiency. 2. The analysis results of the BCC model shows that KGI Bank, Shin Kong Bank, Taipei Fubon Bank, Hua Nan Bank, Chinatrust Bank, Mega Bank, First Bank, Taishin Bank, JihSun Bank, Yuanta Bank, Taiwan Cooperative Bank and Taiwan Bank are all had an efficiency value of 1 from 2015 to 2017, which indicating that the investment of the above banks has been effectively used. 3. The analysis results of the SE model shows that Taipei Fubon Bank, Hua Nan Bank, Chinatrust Bank, Mega Bank, First Bank, Taishin Bank and Taiwan Bank are all had an efficiency value of 1 from 2015 to 2017, which indicating that the investment of the above banks has been optimal production scale. 4. This thesis uses Tobit regression analysis to define the overdue ratio, deposit ratio , and capital adequacy ratio as independent variables that affect the performance of financial controls. Only the capital adequacy ratio was significant.
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