st: Re: state the same for multiple observations?

["Michael Blasnik" <michael.blasnik@verizon.net>]

...This should flag all observations within a us_id if there is more than 
one state listed for that us_id:

bysort us_id (state): gen byte diffstate=state[1]!=state[_N]

Michael Blasnik


----- Original Message ----- 
From: "Ms. Marilyn Ibarra" <ibarra@uga.edu>
To: <statalist@hsphsun2.harvard.edu>
Sent: Tuesday, November 14, 2006 9:41 AM
Subject: st: state the same for multiple observations?



> Anyone have an idea of how I can do the following:
>
> The data looks something like this:
>
> us_id       state
> 1               CA
> 1               CA
> 2               VA
> 3               PA
> 3               TX
>
> I need to know if when a us_id has multiple observations is the state the 
> same for each observation in that us_id.  If the state is different for a 
> given us_id I need to be able to easily identify those cases.
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