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Re: st: poisson - bootstrapping or clustering?
At 09:05 AM 9/12/2006, Stas Kolenikov wrote:
It would be cheating if he kept on changing the seed until the
coefficients came out the way he wanted! I am not sure it is
cheating if you tweak things just to get the models to converge.
Trying out different seeds is kinda cheating -- it is like you run a
hundred regressions and pick the one you liked best :)). The actual
problems might be twofold:
Another possibility might be to change the maximization options, e.g.
add the -difficult- option. This sometimes helps when models aren't
I am curious why the problem occurs in the first place. I checked
the Statalist archives, and saw that other people had reported
similar problems, but Stas is the first person I've seen who offered
some sort of diagnosis. I wonder if the error message is deceptive
in this case; it doesn't make much sense to say there are no cases,
although that might be a consequence of some other error.
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
WWW (personal): http://www.nd.edu/~rwilliam
WWW (department): http://www.nd.edu/~soc
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