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Re: st: Bootstrapping Error


From   Stas Kolenikov <skolenik@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Bootstrapping Error
Date   Thu, 7 Oct 2010 10:58:10 -0500

It probably means that your program exits with error on most, if not
all, bootstrap samples. If you specified -dots-, then you would see a
green "." for every good sample, and "x" or "e" for invalid samples.
Your program might inadvertently drop some variables because of
collinearity problems, or fail to converge, or whatever else might be
happening. If you specify -noisily- option, you will see the output
from your command as it is executed by the -bootstrap-, and that way
you can find out what exactly is going on.

On Thu, Oct 7, 2010 at 10:37 AM, Lina Marcela Cardona Sosa
<linacardonasosa@gmail.com> wrote:
> Dear all,
>
> I am using bootstrap in STATA 11 to estimate the standard errors of a
> bivariate probit constrained to some restriction. I have written a
> program to estimate the bivariate probit subject to this particular
> constrained and then I use bootstrap over this program : bootstrap _b
> _se, reps(100): myprogram. Once I run it I get the message:
> insufficient observations to compute bootstrap standard errors no
> results will be saved. I have tried to solve the problem using also
> but it doesn't work neither. I have read STATA Manual and online
> examples but I haven't been able to
> understand my problem. I would appreciate any help.
>
> Regards,
>
> Lina.
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
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>



-- 
Stas Kolenikov, also found at http://stas.kolenikov.name
Small print: I use this email account for mailing lists only.

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