Bookmark and Share

Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

AW: st: bootstrap _b VS bootstrap _se


From   "Martin Weiss" <[email protected]>
To   <[email protected]>
Subject   AW: st: bootstrap _b VS bootstrap _se
Date   Wed, 21 Jul 2010 10:22:51 +0200

<> 


" Thanks Marteen again."

You may want to double the "a", not the "e"...



HTH
Martin


-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von Sirak
Gesendet: Mittwoch, 21. Juli 2010 09:57
An: [email protected]
Betreff: Re: st: bootstrap _b VS bootstrap _se

Thanks Marteen again. But what if the coefficients which I found them
significant ( with high t-values) in SUREG are not more significant in
bootstrap _b, reps(1000). Isnt it this means the orginal findings dont
replicate?? I am asking this because I am estimating costs and I find
negative values (negative costs- strange)  which are significant in
SUREG and are not significant at all in bootstrap _b, reps(1000).
Sorry for taking your time. Thanks again.
sirak



On Wed, Jul 21, 2010 at 9:36 AM, Maarten buis <[email protected]>
wrote:
> --- On Wed, 21/7/10, Sirak wrote:
>> But one think I didnt get it here is, the coefficients
>> for  sureg  and bootstrap _b, reps(1000) : sureg  are
>> the same. the change is only in standard deviation and
>> confidence interval. I was expecting to see a little
>> change in the coeficients, but none of them changed.
>>  I have read this suggested that the original findings
>> were replicated. Is that right?
>
> No, that is not correct. The bootstrap is only intended
> as a way to calculate standard errors and confidence
> intervals. It does not and should not change the point
> estimates. The following book is a very readable and
> instructive introduction to the bootstrap:
>
> Bradley Efron and Robert J. Tibshirani (1998) An
> Introduction to the Bootstrap. Monographs on Statistics
> and Applied Probability, nr 57. Boca Raton: Chapman &
> Hall/CRC.
>
> Hope this helps,
> Maarten
>
> --------------------------
> Maarten L. Buis
> Institut fuer Soziologie
> Universitaet Tuebingen
> Wilhelmstrasse 36
> 72074 Tuebingen
> Germany
>
> http://www.maartenbuis.nl
> --------------------------
>
>
>
>
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
>

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2018 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   Site index