Hi,
I stumbled over the fact that 'hausman' cannot be executed after
'panel'. It is documented that you must estimate a --pooled-- model with
OLS to be able to run hausman afterwards.
It took me a while to understand the logic: After 'panel ...
--random-effects' the Hausman test is already carried out automatically,
and you can retrieve the result via $hausman. I will add this hint to
the command ref for 'hausman'.
(While we're at it: The following output of 'hausman' is probably not
marked for translation in the sources:
Variance estimators:
between = 258,452
within = 5,55967
Panel is unbalanced: theta varies across units
)
thanks
sven