固定效应模型结果如下图,其中vc、ind为虚拟变量,201家企业4年的面板数据,这样的分析结果是否可信? reg rdrp ttb itb roe os dar vc ind i.id
note: 2620.id omitted because of collinearity
note: 2653.id omitted because of collinearity
Source | SS df MS Number of obs = 804
-------------+---------------------------------- F(205, 598) = 72.06
Model | 18.3700267 205 .089609886 Prob > F = 0.0000
Residual | .743597272 598 .001243474 R-squared = 0.9611
-------------+---------------------------------- Adj R-squared = 0.9478
Total | 19.113624 803 .02380277 Root MSE = .03526
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rdrp | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
ttb | -.1535976 .1406281 -1.09 0.275 -.4297826 .1225873
itb | -.2952443 .1963575 -1.50 0.133 -.6808786 .0903899
roe | .051268 .0370928 1.38 0.167 -.0215799 .124116
os | -.0405188 .0232713 -1.74 0.082 -.0862221 .0051846
dar | .0298105 .0205799 1.45 0.148 -.0106072 .0702283
vc | .1179135 .026238 4.49 0.000 .0663836 .1694435
ind | .0213405 .0272265 0.78 0.433 -.0321306 .0748117