Friday, February 24, 2006

st: RE: random sample by hhid

One way, would be to keep one observation from each household, randomly sample from the remaining observations, and then merge back to the original dataset.

For example:

sort hhid preserve tempfile tmp bysort hh: keep if _n == 1 sample 10 sort hh save `tmp' restore merge hh using `tmp' keep if _m == 3 drop _m

Scott

> -----Original Message----- > From: owner-statalist@hsphsun2.harvard.edu [mailto:owner- > statalist@hsphsun2.harvard.edu] On Behalf Of Ms. Marilyn Ibarra > Sent: Friday, February 24, 2006 10:17 AM > To: statalist@hsphsun2.harvard.edu > Subject: st: random sample by hhid > > Anyone know how to draw a random sample by hhid? I want to > draw a random sample at the household level, such that it > keeps everyone in the household. I would like a one percent > sample of households. So if I have 100 households but 500 > individuals, I would like for it to keep 1 household (that > is all the members that belong to that 1 household). > > My data looks like this. > > Person hhid age > Luis 1 30 > Nancy 1 35 > Joe 1 32 > Bren 2 15 > Jane 2 9 > Linda 3 11 > Tom 3 65 > > Thanks, > Marilyn. > * > * For searches and help try: > * http://www.stata.com/support/faqs/res/findit.html > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/

* * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/


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