28 Dec
2008
28 Dec
'08
10:21 p.m.
Thank you for the clarification. I now understand what the output of misum
means.
I have another doubt, though. It seems that miest does not support
ivregress in Stata so I am not sure how to combine the imputed datasets for
IV-estimation.
Thanks.
Regards,
Helen
On Tue, Dec 23, 2008 at 4:41 PM, Ken Scheve <kenneth.scheve(a)yale.edu> wrote:
Helen,
"misum" gives you the multiple imputation estimate of the mean and the
standard error of this estimate. It does not give you the standard deviation
of the variable. I suspect you may be comparing these two things and they
are not the same thing. Of course, if upon further investigation you see a
problem, let me know.
Thanks,
Ken
Helen Brown wrote:
hello,
a very basic question: why is it that the standard errors (calculated
with misum) over the 10 imputed datasets with Amelia II are much smaller
than the ones from my original dataset (even for variables that did not have
so many missing obs. or at all in the latter)? Am I doing sth. wrong with
the imputation process?
thanks so much
Helen