我固定效应模型做完,导师要求做自相关和异方差检验。但是我朋友说面板一般可以不做。
我在stata中做了结果如下。
xttest3结果
chi2 (130) = 1.2e+06
Prob>chi2 = 0.0000
. xtcsd,frees
Frees' test of cross sectional independence = 5.594
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Critical values from Frees' Q distribution
alpha = 0.10 : 0.4892
alpha = 0.05 : 0.6860
alpha = 0.01 : 1.1046
. xtcsd,pesaran
Pesaran's test of cross sectional independence = 11.976, Pr = 0.0000