RT。该怎么解释这种现象呢。让我论文怎么做啊,难道是样本数据的问题?使用稳健标准差后,变量的显著性水平太差了,有什么解决办法
xtdpdsys theil fliindex urb sri_empl fli_urb fli_sri ,twostep
theil Coef. Std. Err. z P>z [95% Conf. Interval]
theil
L1. .5524677 .0169195 32.65 0.000 .519306 .5856294
fliindex 1.040799 .0689112 15.10 0.000 .9057353 1.175862
urb -.2365757 .0897869 -2.63 0.008 -.4125548 -.0605967
sri_empl .2885764 .0656463 4.40 0.000 .159912 .4172409
fli_urb 1.295377 .2659548 4.87 0.000 .7741147 1.816638
fli_sri -2.326688 .2667209 -8.72 0.000 -2.849451 -1.803924
_cons -.063842 .0069511 -9.18 0.000 -.0774659 -.0502181
xtdpdsys theil fliindex urb sri_empl fli_urb fli_sri ,twostep vce(robust)
Two-step results
WC-Robust
theil Coef. Std. Err. z P>z [95% Conf. Interval]
theil
L1. .5524677 .2813532 1.96 0.050 .0010256 1.10391
fliindex 1.040799 .4865737 2.14 0.032 .0871318 1.994466
urb -.2365757 1.25276 -0.19 0.850 -2.691941 2.218789
sri_empl .2885764 .9336056 0.31 0.757 -1.541257 2.11841
fli_urb 1.295377 2.92042 0.44 0.657 -4.428542 7.019295
fli_sri -2.326688 2.414554 -0.96 0.335 -7.059127 2.405752
_cons -.063842 .1629688 -0.39 0.695 -.3832551 .255571