Re: st: Survey Estimation, stata manual, example: multistage.dta

[Steven Samuels <ssamuels@albany.edu>]

1. There is no "class" variable in http://www.stata-press.com/data/r9/ 
multistage.dta.
2. The sampling was done in three stages within stages: County,  
School, and Person.  The probability of selecting persons could vary  
within the same school, hence the sampling weights are not constant  
within School


On Jun 9, 2007, at 7:31 AM, Rainer Schnell wrote:


> Hello,
>
> has anyone an explanation why the sampling weights of a two stage  
> sample
> (PSU county, SSU class) varies within a class of the stata  
> demonstration file? The variable sampwgt in the
> demo data file (multistage.dta) is not constant within county,  
> class. Is this an error in the file, the manual or
> do I miss something?
>
> Many thanks for any hint
>
> Rainer Schnell
>
>
>
>
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