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Re: st: not concave Poisson estimation


From   Morten Hesse <mh@crf.au.dk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: not concave Poisson estimation
Date   Fri, 10 Sep 2010 13:06:26 +0200



I must learn that I lose the first line when I send to Statalist. Sorry for double posting!

First of all, you should use xtpoisson. Next, you should check if there are exporters, importers or years, where you have no variation.
Greetings
Morten


Den 10-09-2010 12:56, Morten Hesse skrev:
there are exporters, importers or years, where you have no variation.
Greetings
Morten

Den 10-09-2010 12:42, Estrella Gomez skrev:
Dear statalist:

I have a panel with 5400 pair of countries and 43 years. I am trying
to estimate a Poisson model but when I assume random effects and
specify:

xtreg depvar indepvars i.exporter i.importer i.year, re

Stata keeps iterating the function over the same values during hours
and never converge

How can I solve this?

Thanks in advance
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