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st: RE: Re: state the same for multiple observations?
Note also that this solution is written up at greater
length in
How do I list observations in a group that differ on a variable?
http://www.stata.com/support/faqs/data/diff.html
i.e. this question is an FAQ.
Nick
[email protected]
Michael Blasnik
> ...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]
Marilyn Ibarra
> > 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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