Heteroskedasticity Test: White |
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F-statistic | 0.429071 | Prob. F(20,110) | 0.9838 | |
Obs*R-squared | 9.480128 | Prob. Chi-Square(20) | 0.9766 | |
Scaled explained SS | 33.54876 | Prob. Chi-Square(20) | 0.0293 | |
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Test Equation: |
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Dependent Variable: RESID^2 |
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Method: Least Squares |
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Date: 10/26/18 Time: 10:38 |
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Sample: 1 131 |
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Included observations: 131 |
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Variable | Coefficient | Std. Error | t-Statistic | Prob. |
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0 | ||||
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R-squared | 0.072367 | Mean dependent var | 0.328680 | |
Adjusted R-squared | -0.096293 | S.D. dependent var | 0.919909 | |
S.E. of regression | 0.963182 | Akaike info criterion | 2.908744 | |
Sum squared resid | 102.0491 | Schwarz criterion | 3.369654 | |
Log likelihood | -169.5227 | Hannan-Quinn criter. | 3.096032 | |
F-statistic | 0.429071 | Durbin-Watson stat | 1.439913 | |
Prob(F-statistic) | 0.983765 |
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用white稳健的标准误试了一下,系数反而小了一些,不是没有异方差吗,为什么异方差修正后系数的p值会变小
Dependent Variable: EPS |
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Method: Least Squares |
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Date: 10/26/18 Time: 10:35 |
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Sample: 1 131 |
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Included observations: 131 |
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HAC standard errors & covariance (Bartlett kernel, Newey-West fixed | ||||
bandwidth = 5.0000) |
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Variable | Coefficient | Std. Error | t-Statistic | Prob. |
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C | 1.160754 | 0.236124 | 4.915870 | 0.0000 |
ECR | -0.515376 | 0.339274 | -1.519057 | 0.1313 |
CS | -1.347082 | 0.281263 | -4.789397 | 0.0000 |
AROIT | 0.049261 | 0.038500 | 1.279487 | 0.2031 |
APTR | 7.13E-06 | 6.31E-06 | 1.129532 | 0.2608 |
ICR | -0.001046 | 0.000177 | -5.903565 | 0.0000 |
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R-squared | 0.212379 | Mean dependent var | 0.122794 | |
Adjusted R-squared | 0.180874 | S.D. dependent var | 0.648473 | |
S.E. of regression | 0.586904 | Akaike info criterion | 1.816810 | |
Sum squared resid | 43.05710 | Schwarz criterion | 1.948498 | |
Log likelihood | -113.0011 | Hannan-Quinn criter. | 1.870321 | |
F-statistic | 6.741143 | Durbin-Watson stat | 1.371464 | |
Prob(F-statistic) | 0.000014 | Wald F-statistic | 16.31179 | |
Prob(Wald F-statistic) | 0.000000 |
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