Evolution of the Efficiency of Nationwide Commercial Banks in China Based on an SBM-Undesirable Model and DEA Window Analysis

Table 2

Correlation coefficients between input and output indexes.

	Net fixed assets	Business and management fees	Total deposits	Net interest income	Noninterest income	Nonperforming loans
Net fixed assets	1.000
Business and management fees	0.951	1.000
Total deposits	0.952	0.983	1.000
Net interest income	0.930	0.987	0.989	1.000
Noninterest income	0.920	0.908	0.933	0.921	1.000
Nonperforming loans	0.261	0.323	0.301	0.302	0.230	1.000

Significance within the level of 10%; significance within the levels of 5%; significance within the levels of 1%.