Re: st: difference in residuals

[Cinzia Rienzo <C.Rienzo@rhul.ac.uk>]

thanks Marteen, 
for glm i used:  predict resglm
for ols i use: predict resols, resid

is this correct?
but when i use the predict of Glm i get (almost) the same result!

cinzia



Maarten buis wrote:


>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 <C.Rienzo@rhul.ac.uk> 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
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>The Netherlands
>
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>
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>
>
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