急急急 各位各位,28个DMU,5年的数据,4投入2产出,做Malmquist测算,effch、pech、sech 输出结果大部分都是1是什么情况呢?紧急求助
MALMQUIST INDEX SUMMARY OF ANNUAL MEANS
year effch techch pech sech tfpch
2 1.005 1.016 1.000 1.005 1.021
3 1.001 0.955 1.000 1.001 0.956
4 1.004 0.973 1.000 1.004 0.976
5 0.998 1.022 1.000 0.998 1.020
6 1.003 0.987 1.000 1.003 0.990
mean 1.002 0.990 1.000 1.002 0.992
MALMQUIST INDEX SUMMARY OF FIRM MEANS
firm effch techch pech sech tfpch
1 1.000 0.996 1.000 1.000 0.996
2 1.000 1.006 1.000 1.000 1.006
3 1.000 0.996 1.000 1.000 0.996
4 1.000 0.995 1.000 1.000 0.995
5 1.000 0.997 1.000 1.000 0.997
6 1.004 0.977 1.000 1.004 0.981
7 1.004 0.980 1.000 1.004 0.984
8 1.000 0.991 1.000 1.000 0.991
9 1.000 0.993 1.000 1.000 0.993
10 1.000 0.997 1.000 1.000 0.997
11 1.004 0.979 1.000 1.004 0.982
12 1.001 0.996 1.000 1.001 0.997
13 1.000 0.980 1.000 1.000 0.980
14 1.004 0.996 1.000 1.004 1.000
15 1.006 0.983 1.000 1.006 0.988
16 1.005 0.986 1.000 1.005 0.991
17 1.001 0.996 1.000 1.001 0.997
18 1.003 0.989 1.000 1.003 0.993
19 1.003 0.981 1.000 1.004 0.984
20 1.006 0.992 1.000 1.006 0.998
21 1.004 0.994 1.000 1.004 0.997
22 1.000 0.988 1.000 1.000 0.988
23 1.006 0.985 1.000 1.006 0.990
24 1.004 0.978 1.000 1.004 0.981
25 1.000 1.026 1.000 1.000 1.026
26 1.000 0.984 1.000 1.000 0.984
27 1.003 0.986 1.000 1.003 0.989
28 1.005 0.980 1.000 1.005 0.985
mean 1.002 0.990 1.000 1.002 0.992