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Re: st: Ungrouping income data


From   Stas Kolenikov <skolenik@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Ungrouping income data
Date   Fri, 4 Feb 2005 19:28:14 -0500

I would also take logs and put the logs of those values into -intreg-,
as income distributions are highly skewed, so logging makes them at
least somewhat resembling the normality assumed by -intreg-.

Stas

On Fri, 4 Feb 2005 09:12:30 -0800 (PST), SamL <saml@demog.berkeley.edu> wrote:
> Not sure about your aim, but you might take a look at tobit, and check the
> section on intreg.  It allows one to estimate a model on data that
> contains any subset of a)cases with exact values, b)cases with upper and
> lower bounds (e.g., like the ranges you describe below), c)cases with
> values censored from above, and d)cases with values censored from below.
> This command (-intreg-) may be of use to you.
> 
> Hope this helps.
> Sam
> 
> On Fri, 4 Feb 2005, Alan Acock wrote:
> 
> > I have data on income grouped in ranges (0-29,999) ... (100,000 and over).
> > Is there a program in Stata that will convert these ranges to point values
> > (medians)? Is there a way that takes the distribution into account? Is there
> > a way to get a value for the end category of 100,000 or more that takes the
> > distribution into account. I know demographers have formulas for this, but
> > has anybody put these into a Stata program?
> >
> > Alan Acock
> >
> >
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> 


-- 
Stas Kolenikov
http://stas.kolenikov.name
*
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