初学stata,按照书上的用GMM检验后得到结论,但是不懂什么意思,这是说原假设都不能拒绝么?恳请哪位大神帮忙解释一下,谢谢了
. estat abond
Arellano-Bond test for zero autocorrelation in first-differenced errors
+-----------------------+
|Order | z Prob > z|
|------+----------------|
| 1 |-2.7513 0.0059 |
| 2 | .90839 0.3637 |
+-----------------------+
H0: no autocorrelation
. estat sargan
Sargan test of overidentifying restrictions
H0: overidentifying restrictions are valid
chi2(60) = 53.94741
Prob > chi2 = 0.6953


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