各位高手,在做panel data时,发现用于选择Fixed model和Random Model的Hausman检验量为负,如何解释?
计算结果由本人编程实现,在其他地方运行是对的,所以计算结果为负本身没有计算错误!
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楼主: tanbenyan
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Hausman检验量为负如何解释? |
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回帖推荐楼上可能把HAUSMAN TEST 为负 想的简单了一些。You can not exchange the order of hausman test. By original order, the variance-covariance matrix muse be PD. That is, by theory hausman test statistic is positive. But this is large sample property,in empircal study, no reason believes the variance-covariance matrix is PD. If you change the order, it is not the HAUSMAN test and you can not get any usef ...
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