Amanda Elam <[email protected]> asks:
> Does anyone have any idea what this error message means? Is there a
> work-around?
> . xtmelogit suboanw female || country: female, or variance
> Refining starting values:
> initial values not feasible
> r(1400);
The error message means that -xtmelogit-'s automatic choice of starting values
produced values that choked the optimizer. Although rare, it has been known
to happen.
One solution would be to fit a simpler -xtmelogit- model
. xtmelogit suboanw female || country:
and then use these estimates as starting values for the model you are
interested in
. mat b = e(b)
. xtmelogit suboanw female || country: female, or variance from(b)
-from(b)- sets the starting values as those from the simpler model, and
-xtmelogit- is smart enough to fill in a trailing zero as the starting value
for the log of the new variance component.
If that doesn't work, you could also try adding a further option to eliminate
the initial rough optimization process
. xtmelogit suboanw female || country: female, or variance from(b)
refineopts(iterate(0))
(all on one line)
If that doesn't do the trick, then it would probably be best if we could get a
look at these particular data. Amanda can feel free to email me directly or
[email protected].
--Bobby
[email protected]
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