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From |
Stas Kolenikov <skolenik@gmail.com> |

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/

**References**:**st: random sampling matching the characteristics of the sample***From:*Andrea Rispoli <andrea.rspl@gmail.com>

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