Re: st: Comparing frequencies with pweight

[Steven Samuels <sjhsamuels@earthlink.net>]

Martin's suggestions of -svy: tab- , with "organization' designated  
as the psu, is probably the right one. However, I'm not sure. With  
your specification "x" and "y" must be attributes of the  
organizations. One must be "wave". What is the other? -pweight- will  
weight the organizations by the number of clients. So, essentially  
you are classifying clients by the attribute of their organization  
and ignoring organization , except to compute standard errors. For  
example, if you classify organizations as "big" and "small", -svy:  
tab- would compare the proportions of clients who are in big  
organizations in 1995 and 2005 Is this what you want?

Are the 618 organizations a sample of a population? If so, please  
describe the design, for you need to take into account other aspects  
of the design. Final question: what do you mean by "adjust for N"?


-Steve

On Nov 14, 2008, at 12:24 PM, Martin Weiss wrote:

> Have you checked out -help svy: tabulate twoway-?
>
> HTH
> Martin
> -------- Original-Nachricht --------
> > Datum: Fri, 14 Nov 2008 09:52:33 -0600
> > Von: Erick Guerrero <erickg@uchicago.edu>
> > An: statalist@hsphsun2.harvard.edu
> > Betreff: st: Comparing frequencies with pweight
>
> > Hi, I need code for Stata to do descriptives - chi-squares with
> > p-weights and adjust for N.
> >
> > I am trying to compare percentages between two waves (1995 and  
> > 2005) on
> > 618 organizations.
> >
> > The tab x y, col row chi with pweight (number of clients in each
> > organization) does not work, and when I use fweight gives me an  
> > inflated
> > N. What is the proper way to compare these frequencies in  
> > organizations
> > and weight by number of clients and adjust for N in stata?
> >
> > Thanks,
> >
> >
> > Erick
> > *
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*
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