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st: RE: RE: calculating means by group, with weights
On the point raised by Nick: I have often seen people using aweights for
survey data. Is that wrong?
Shehzad
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Nick Cox
Sent: 25 June 2008 17:36
To: [email protected]
Subject: st: RE: calculating means by group, with weights
A different issue: shouldn't survey weights be pweights?
-----Original Message-----
From: Nick Cox
Sent: 25 June 2008 17:23
To: '[email protected]'
Subject: RE: calculating means by group, with weights
This is an FAQ.
FAQ . . Calculating variables containing weighted group summary
statistics
. . . . . . . . . . . . . . . . . . . . . N. J. Cox and S. P.
Jenkins
1/03 I want to calculate a variable containing weighted
group summary statistics, but I do not want to
collapse the data and egen does not support weights.
How can I do this?
http://www.stata.com/support/faqs/data/weighted.html
Gisella Young
I am trying to calculate the mean of a variable ("income") across groups
("bracket"), but using the relevant survey weights (variable "weight").
I tried saying:
bys bracket: egen float meanincome = mean(income) [fweight=weight]
but this is not possible since the egen command does not allow for
weighting. This is a problem for me as if I do not use the weights the
means will be wrong.
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