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Re: st: xtmixed with nonrtolerance. What happens?

From   Maarten Buis <>
Subject   Re: st: xtmixed with nonrtolerance. What happens?
Date   Fri, 24 Jun 2011 12:30:53 +0200

--- On Fri, Jun 24, 2011 at 12:11 PM, "Lukas Bösch" wrote:
> One more information:
> When i run the modell only with the complete export time series. Without any zeroes in the dependent data, the output looks like this:
>                 sd(R.genus) |   2.93e-06   .0221629             0

I would not trust that result. First, leaving out 0s means you select
on your dependent variable, which is a very bad idea. Second, your
results indicate that the genus variation is de facto 0 (2.93e-6 =
0.000000293), which given your context is very unlikely.

-- Maarten

Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen

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