Analysis of Chinese Commercial Banks’ Risk Management Efficiency Based on the PCA-DEA Approach

Table 1

DEA window analysis example (ω = 3).

Window	t = 1	t = 2	t = 3	t = 4	t = 5	…	t = T − 4	t = T − 3	t = T − 2	t = T − 1	t = T
Window 1
Window 2
…
Window T − ω
Window T − ω + 1