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Re: st: computing percentages


From   David Kantor <dkantor@jhu.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: computing percentages
Date   Wed, 28 Apr 2004 11:29:56 -0400

At 09:36 AM 4/28/2004 -0500, Mike Merten wrote:
I am using the following command:

g nonmetro=hmsa_r==2

g total=hmsa_r==1 | hmsa_r==2 | hmsa_r==3

gen pnonmetro=nonmetro/total

I want the "pnonmetro" variable to be expressed in terms of percentage, from the resulting nonmetro/total. How do I do this?

Thanks,
[...]
As Nick pointed out, you probably want to aggregate over the dataset or parts thereof, counting up and dividing (count of nonmetro) / (count of total) .

But note that pnonmetro is valued either 0, 1, or missing. If you take its mean (-sum pnonmetro-), I believe the result will be the same as the quotient of counts as above.

(I've left off the factor of 100 -- a cosmetic change.)

I hope this helps.
-- David


David Kantor
Institute for Policy Studies
Johns Hopkins University
dkantor@jhu.edu
410-516-5404

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