Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and running.


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

Re: st: Selecting a sample to compromise between significant size and geographical dispersion


From   Partho Sarkar <partho.ss+lists@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Selecting a sample to compromise between significant size and geographical dispersion
Date   Fri, 16 Sep 2011 20:02:49 +0530

Thanks a lot again, Steve.  Of course I do get your point about a
statistically sound stratification scheme, which would also enable
estimation of standard errors of estimates.  Let me explore this, and
see how best I can fit it within my project timeline.  In practical
terms however, I think I need to stay within the Stata environment as
far as possible for the time being.

Regards
Partho

On Fri, Sep 16, 2011 at 6:50 PM, Steven Samuels <sjsamuels@gmail.com> wrote:
> Partha,  Your problem is a fairly standard one, with some wrinkles, and the standard solution begins with optimal stratum formation (which can include take-none strata) and optimal allocation of observations to strata.  The calculations minimize estimation error for a bound on cost or vice-versa. Your iterative scheme ignores estimation error and so will be non-optimal. I strongly suggest that you consult a good sampling text or a sampling statistician instead of spending your  time on an inferior, possibly disastrous, design.
>
> Steve
>
> On Sep 16, 2011, at 3:34 AM, Partho Sarkar wrote:
>
> Thank you, Steven.  The program looks promising at first glance-I will
> look at it in detail later.  For the time being, I think I can put
> together an iteration method within Stata.  I will report back here on
> this.
>
> Regards
> Partho

*
*   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 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index