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Re: st: difference in residuals


From   Maarten buis <[email protected]>
To   [email protected]
Subject   Re: st: difference in residuals
Date   Thu, 5 Apr 2007 12:37:35 +0100 (BST)

Looking at the resglm results I don't think they are the residuals but
the linear predictor. Did you correctly use -predict- here (the options
of predict after -glm- are different than those after -regress-).

Hope this helps,
Maarten

--- Cinzia Rienzo <[email protected]> wrote:

> Dear all,
>  
> i am replicating a paper so i know the results i should get; the aim
> is 
> to analyse the residual of a regression; 
> the problem is that  when i regress the following:
> 
> glm  lwage1 age  educ educage educage2 educage3 educage4 [aw=hwt]
> 
> i obtain the same results as the author exept for the variance gap of
> 
> the 90-10 centile.
> 
> When instead i regress the following:
> reg  lwage1 age  educ educage educage2 educage3 educage4 [aw=hwt]
> i get the same 90-10 gap centile but the other results are different.
> 
> Both regressions give the same coefficient but the residual are 
> different: 
> 
> Variable |       Obs        Mean    Std. Dev.       Min        Max
> ------------+--------------------------------------------------------
>  resols |   1761676   -.0012382     .454438  -2.421267   3.340183
>  resglm |   1761676     1.77811    .3409537   .6651884  2.437594
> 
> Could you please suggest me what could be the problem or is it 
> methodologically not correct to work with the two regressions and 
> therefore with the two residuals?
> Hope the problem is clear.
> 
> Best
> 
> Cinzia
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> 


-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


		
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