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st: RE: How to tell with transformation is better?


From   "Martin Weiss" <martin.weiss@uni-tuebingen.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: How to tell with transformation is better?
Date   Thu, 28 Aug 2008 14:46:48 +0200

Well, if you want ideas for a whole range of transformations, try -qladder-.
Other than that, you have provided the measure of a better transformation by
employing the R-square. I do not think that there is a procedure in Stata
that explicitly endorses such a model selection strategy. In terms of
covariates, -stepwise- comes to mind...

HTH
Martin

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of wangxin
Sent: Thursday, August 28, 2008 4:03 AM
To: statalist@hsphsun2.harvard.edu
Subject: st: How to tell with transformation is better?

Hi, all:

I have a linear regression model which is not very
good since the R-square is very low.I test the
Log-transformed dependent also, which turns to be not
good also. I am wondering is there a way in Stata to
test which transformation for variable is better? 
Any advice is appreciated.

-Xin






      

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