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Re: st: r-square in -betafit-

From   Maarten buis <>
Subject   Re: st: r-square in -betafit-
Date   Mon, 21 Jun 2010 07:45:20 +0000 (GMT)

--- On Sun, 20/6/10, SURYADIPTA ROY wrote:
> The AIC and the BIC values for the -betafit- model are  
> ( -773.5497, -729.3715), and that for OLS are (-478.2641, 
> -436.5402).

Remember when dealing with *ICs: smaller is better, so in this
case -betafit- is prefered.

Anyhow the much better way to select models is to look at your
data (graphs, graphs, and many many more graphs). I often find it
useful not to focus on trying to find the best model, but instead
try to understand where the differences between models come from. 
Then it will become obvious which one is the prefered summary of 
your data for your question. Notice what is a good summary 
depends on the question you want your model to answer, so don't 
get carried away by trying to get the "universally best model". 
Once the best model for your question is obvious, it will also 
be much easier to explain that to your audience. 

Hope this helps,

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


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