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]

# Re: st: random sampling matching the characteristics of the sample

 From Stas Kolenikov To statalist@hsphsun2.harvard.edu Subject Re: st: random sampling matching the characteristics of the sample Date Mon, 30 Apr 2012 21:13:14 -0500

```So why exactly do you want to do this? You will only lose in
precision, provided your model is OK; if it is badly misspecified,
then God only knows how your coefficients could jump around, so you
probably should not trust either specification, anyway.

On Mon, Apr 30, 2012 at 6:44 PM, Andrea Rispoli <andrea.rspl@gmail.com> wrote:
> Dear Statalisters,
> I am running a regression model: y=f(x, age, size) where x is a dummy
> variable that can take value 1 or 0.
> Since in my sample x=1 for 10% of the sample and x=0 for 90% of the
> sample, I would like to identify a random subsample among the group
> x=0 so that it is more "comparable" in terms of size with the
> subsample for which x=1.
>
> My problem is that I would like that the selected subsample (in which
> x=0) matched the characteristics of the first subsample (x=1) on the
> other dimensions (e,g age and size).
> For instance, if I take the subsample x=1, mean of age = 37, mean of size=45.
> I would like to randomly select the second subsample (x=0), so that
> mean of age = 37, mean of size=45 as it is the case in the first
> subsample (x=1).
>
> Do you have any suggestions on how I could achieve such result in stata?
>
> Thank you very much in advance for all your help!!!
> Kind Regards
> *
> *   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/

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

*
*   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