A Network DEA Model with Super Efficiency and Undesirable Outputs: An Application to Bank Efficiency in China

Table 1

Pooled descriptive statistics of inputs and outputs (185 observations).

Variable	Mean	Std. Dev.	Min.	Max.
Subprocess 1 inputs
𝑥1 = fixed assets	2489.101	5914.042	2.561	28267.010
𝑥2 = equity	17342.500	38230.240	80.385	212196.100
𝑥3 = personnel expenses	1612.693	3565.357	6.613	18097.020
Intermediates
𝑧1 = deposits and short-term funding	257641.300	550848.900	1286.135	2897070.000
𝑧2 = other raised funds	4941.384	12923.420	0.010	106278.600
Final outputs
𝑦1 = gross loans	146832.400	314206.600	892.766	1655451.000
𝑦2 = other earning assets	130770.400	282761.900	287.213	1537414.000
𝑏 = NPLs	1860.672	4234.151	0.038	19615.920

Note: all are in million USD.