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Re: st: bstrap


From   Manuel Chávez <mchavez@evalalianza.org.mx>
To   <statalist@hsphsun2.harvard.edu>
Subject   Re: st: bstrap
Date   Thu, 1 Sep 2005 11:20:56 -0500

Thank you Jamie


----- Original Message -----
From: "Jamie Griffin" <Jamie.Griffin@lshtm.ac.uk>
To: <statalist@hsphsun2.harvard.edu>
Sent: Thursday, September 01, 2005 11:12 AM
Subject: Re: st: bstrap


> Since bootstrapping works by selecting random samples of the dataset the
results will be different each time. But  if you have enough bootstrap
replications, then the results shouldn't differ much. To get exactly the
same results, you should set the seed for the random number generator to the
same positive integer each time:
>
> set seed 27
> bootstrap ...
>
> _bootstrap_ is the more up-to-date name than _bstrap_  for the command.
>
> Jamie Griffin.
>
>
> >>> mchavez@evalalianza.org.mx 09/01/05 4:49 pm >>>
> I'm using bstrap to estiamte the bias of ATT using psmatch and I getting
> differente results each time I run it. Why is this? Is this normal? is any
> way to replicate the results?
>
> Thanks
>
> Manuel G. Chávez Angeles
> FAO
> Consultor Nacional de Impactos
>
> Providencia No. 334 5º Piso
> Col. del Valle
> México, D.F. 03100
> México
> Tel. 11076425/26/30/31 Ext. 319
>
>
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