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st: RE: RE: RE: Re: random allocation [was:RE: programming question]


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: RE: Re: random allocation [was:RE: programming question]
Date   Mon, 3 Nov 2003 15:09:00 -0000

One generalisation of such stuff is the -egen- 
function -rndsub- in -egenmore- on SSC. 

Nick 
n.j.cox@durham.ac.uk 

> Check out -by:- (various sections in the manual, plus
> a tutorial in Stata Journal 2(1):86-102 (2002)). 
> 
> set seed 31103
> set obs 100 
> gen id = _n 
> egen group = seq(), block(10) 
> gen random = uniform()
> bysort group (random) : gen treatment = cond(_n <= 5, "A", "B") 
> sort id 
> l id group treatment 

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