st: How to test heteroskedastic and autocorrelation in fixed effect model.

["Keynes M. Smith" <econtu@gmail.com>]

Hi,

I try to search for command in Stata to test for heteroskedastic and
autocorrelation

but I can't found the command that can test on fixed effect model and
suitable with my data.

(I try to use -xtserial- to test for serial correlation but I don't
think it test on fixed effect model)

The model that I work on consist of 16 years, 10 countries and 12 variables.

So, I think I can't use xttest3 to test the model.

Besides, if the result is the model have heteroskedastic and/or
autocorrelation, how can I correct it?

Thanks

A. Sura
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