最近写一篇小论文,用的是N为8,T为13的面板数据,模型经hausman检验p值大于0.05,那就使要用随机效应模型吗?我在一个老外的讲义上看到这样一句话:Random and fixed are not that much different if you have panels with lots of years. Random is usually preferred when you have large number of entities. 由于我的模型中N是8,那么最好使用固定效应吗?疑惑!!!到底是选固定效应还是随机效应呢???是不是我的数据太少了?
希望各位高手能够给些建议,感激不尽!!!
In a short panel, I advise you try random effect in order to minimize bias. Of course, the p value in your test is very small, which might be another reason you could use random effect