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Re: st: RE: Prais with vce(robust)


From   Thomas Jacobs <thomasjacobs@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: Prais with vce(robust)
Date   Sun, 20 Jun 2010 07:50:06 -0500

Martin,

Thanks very much for the reply and confirmation.  I had not thought to
return to an earlier version of Stata to workaround; I can go back to
10.1.

Tom

On Sun, Jun 20, 2010 at 3:37 AM, Martin Weiss <martin.weiss1@gmx.de> wrote:
>
> <>
>
> Thomas does have a good case with his complaint re -vce(robust)-. Even the
> official example gets stuck:
>
> ***********
>
> webuse idle, clear
> tsset t
>
> prais usr idle
> prais usr idle, corc
> prais usr idle, corc vce(robust)
> ***********
>
> The same example does run w/o problems in 10.1. The problem seems to be that
> lines 136-138 of -prais.ado- request -_regress- to accept a -vce(robust)-
> option, which it rejects.
>
> Indeed, when I run
>
> -version 11.1, missing: _regress usr idle,  vce(robust)- on the dataset from
> the example above, I get the same rejection. It only works when I change the
> call to
>
> -version 11.1, missing:  _regress usr idle,  robust-
>
>
>
> HTH
> Martin
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Thomas Jacobs
> Sent: Sonntag, 20. Juni 2010 01:29
> To: StataList
> Subject: st: Prais with vce(robust)
>
> I am trying to perform regressions with prais and the vce(robust)
> option as per the manual.  Yet, I keep getting an error that the
> option is not allowed:
>
> . prais IISBasis TenYrTreasLiq TBillRepo3Mspread TIPS_Share
> Bank_CDS_5Y SPF10YR if TenorYr==2, vce(robust)
> option vce() not allowed
> r(198);
>
> It works fine without it:
>
> . prais IISBasis TenYrTreasLiq TBillRepo3Mspread TIPS_Share
> Bank_CDS_5Y SPF10YR if TenorYr==2
>
> Iteration 0:  rho = 0.0000
> Iteration 1:  rho = 0.1506
> Iteration 2:  rho = 0.1765
> Iteration 3:  rho = 0.1806
> Iteration 4:  rho = 0.1812
> Iteration 5:  rho = 0.1813
> Iteration 6:  rho = 0.1813
> Iteration 7:  rho = 0.1813
> Iteration 8:  rho = 0.1813
>
> Prais-Winsten AR(1) regression -- iterated estimates
>
>      Source |       SS       df       MS              Number of obs =
> 19
> -------------+------------------------------           F(  5,    13) =
> 10.33
>       Model |  1.32617093     5  .265234186           Prob > F      =
> 0.0004
>    Residual |  .333633316    13  .025664101           R-squared     =
> 0.7990
> -------------+------------------------------           Adj R-squared =
> 0.7217
>       Total |  1.65980425    18  .092211347           Root MSE      =
> .1602
>
> ----------------------------------------------------------------------------
> --
>    IISBasis |      Coef.   Std. Err.      t    P>|t|     [95% Conf.
> Interval]
> -------------+--------------------------------------------------------------
> --
> TenYrTreas~q |   1.449256   .6318501     2.29   0.039     .0842271
> 2.814286
> TBillRepo3~d |   .8240618    .203306     4.05   0.001     .3848459
> 1.263278
>  TIPS_Share |   .0662117   .1569602     0.42   0.680    -.2728803
> .4053037
>  Bank_CDS_5Y |   .0678376   .1154862     0.59   0.567    -.1816552
> .3173304
>     SPF10YR |   1.024128   .5681905     1.80   0.095    -.2033725
> 2.251629
>       _cons |  -2.777354   1.369345    -2.03   0.064    -5.735644
> .1809365
> -------------+--------------------------------------------------------------
> --
>         rho |   .1813495
> ----------------------------------------------------------------------------
> --
> Durbin-Watson statistic (original)    1.695354
> Durbin-Watson statistic (transformed) 1.853295
>
> Can anyone suggest what I may be doing wrong here?
> Thanks,
>
> Tom
> --
> Thomas Jacobs
> *
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>



-- 
Thomas Jacobs

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