使用frontier4.1估算企业的成本效率,估量结果如下:
the final mle estimates are :
coefficient standard-error t-ratio
beta 0 -0.47908616E+00 0.10000000E+01 -0.47908616E+00
beta 1 0.10400528E+01 0.10000000E+01 0.10400528E+01
beta 2 0.43231752E-01 0.10000000E+01 0.43231752E-01
beta 3 0.10294735E+01 0.10000000E+01 0.10294735E+01
beta 4 -0.68040193E-02 0.10000000E+01 -0.68040193E-02
beta 5 0.59750170E-02 0.10000000E+01 0.59750170E-02
beta 6 0.38491648E+00 0.10000000E+01 0.38491648E+00
beta 7 0.23940067E-03 0.10000000E+01 0.23940067E-03
beta 8 -0.27283159E-02 0.10000000E+01 -0.27283159E-02
beta 9 0.12565403E-01 0.10000000E+01 0.12565403E-01
beta10 -0.26940089E-01 0.10000000E+01 -0.26940089E-01
beta11 0.58077192E-03 0.10000000E+01 0.58077192E-03
beta12 0.21349826E-02 0.10000000E+01 0.21349826E-02
beta13 -0.86460251E-03 0.10000000E+01 -0.86460251E-03
beta14 -0.10569630E-01 0.10000000E+01 -0.10569630E-01
beta15 0.37129132E-01 0.10000000E+01 0.37129132E-01
beta16 -0.25746186E+00 0.10000000E+01 -0.25746186E+00
beta17 0.13483568E-01 0.10000000E+01 0.13483568E-01
beta18 -0.13458877E+00 0.10000000E+01 -0.13458877E+00
beta19 -0.66911848E-01 0.10000000E+01 -0.66911848E-01
delta 1 0.00000000E+00 0.10000000E+01 0.00000000E+00
delta 2 0.00000000E+00 0.10000000E+01 0.00000000E+00
delta 3 0.00000000E+00 0.10000000E+01 0.00000000E+00
delta 4 0.00000000E+00 0.10000000E+01 0.00000000E+00
delta 5 0.00000000E+00 0.10000000E+01 0.00000000E+00
sigma-squared 0.41339708E-02 0.10000000E+01 0.41339708E-02
gamma 0.54000000E+00 0.10000000E+01 0.54000000E+00
log likelihood function = 0.66864585E+03
LR test of the one-sided error = 0.16378587E+02
无效率影响因素部分的系数与误差以及T值全部为零,求大神解答,这是为什么啊?


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