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Re: st: Save the percentage of each response category into new variables


From   Maarten Buis <maartenlbuis@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Save the percentage of each response category into new variables
Date   Fri, 9 Sep 2011 18:28:15 +0200

On Fri, Sep 9, 2011 at 6:14 PM,  <hsiyuan@uchicago.edu> wrote:
> I have a panel data where I want to compare the percentage of people belonging to each category of the marital status variable in each group and each time point. There are five categories in the marriage variable and I have two time points and two groups each with say, 50 people.

The trick is that the proportion is the mean of a dummy/indicator variable, so:

*-------------- begin example -----------------
sysuse nlsw88
bys race: egen p_mar = mean(married)
bys race: egen p_n_mar = mean(never_married)
*------------- end example -----------------
(For more on examples I sent to the Statalist see:
http://www.maartenbuis.nl/example_faq )

Hope this helps,
Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany


http://www.maartenbuis.nl
--------------------------

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