reg y x1 x2 x3 x4 x5 x6 x8 x9 x10 x11 x12 x13 x14 x15 x16 x19 x17 x24,robust
Linear regression Number of obs = 140
F(18, 121) = 8.82
Prob > F = 0.0000
R-squared = 0.4676
Root MSE = 1.7535
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| Robust
y | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
x1 | -.0001761 .0249197 -0.01 0.994 -.0495113 .049159
x2 | .0061523 .0019833 3.10 0.002 .0022259 .0100786
x3 | .4171977 .3048125 1.37 0.174 -.1862591 1.020654
x4 | .5048009 .3239333 1.56 0.122 -.1365106 1.146112
x5 | .5748635 .4243317 1.35 0.178 -.265213 1.41494
x6 | .6660383 .3094482 2.15 0.033 .053404 1.278673
x8 | -.3951711 .1911326 -2.07 0.041 -.7735684 -.0167737
x9 | .1903886 .0850648 2.24 0.027 .0219804 .3587968
x10 | .1088711 .1709167 0.64 0.525 -.2295035 .4472457
x11 | .9865899 .413527 2.39 0.019 .1679042 1.805276
x12 | .0629521 .0170973 3.68 0.000 .0291035 .0968007
x13 | .6826136 .3503132 1.95 0.054 -.0109238 1.376151
x14 | 1.094749 .3399816 3.22 0.002 .4216658 1.767832
x15 | .3771459 .4100998 0.92 0.360 -.4347549 1.189047
x16 | .1819297 .3702915 0.49 0.624 -.55116 .9150195
x19 | -.7969125 .3595848 -2.22 0.029 -1.508805 -.0850196
x17 | -.3894345 .4255989 -0.92 0.362 -1.23202 .4531507
x24 | .8092824 .5379842 1.50 0.135 -.2557993 1.874364
_cons | -.5199883 1.710456 -0.30 0.762 -3.906287 2.86631
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因为存在异方差,所以使用了稳健的标准误,然后想在这个结果的基础上再进行逐步回归,请问应该怎样输入命令?


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