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Re: st: Flagging most frequent occurrence


From   Maarten Buis <maartenlbuis@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Flagging most frequent occurrence
Date   Thu, 24 Oct 2013 09:40:23 +0200

On Thu, Oct 24, 2013 at 8:03 AM, Steven Archambault wrote:
> I have panel data, where observations occur in different years. I want
> to flag the year that occurs the most often.

*------------------ begin example ------------------
// input some example data
clear all
input ///
id year
1 2008
1 2008
1 2009
2 2009
2 2009
2 2010
2 2010
3 2009
3 2009
3 2010
end

// compute the flag
bys year : gen flag = _N
sum flag, meanonly
replace flag = (flag == r(max))

// admire the result
sort id year
list, sepby(id)
*------------------- 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
WZB
Reichpietschufer 50
10785 Berlin
Germany

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