On Thu, 18 Dec 2003, Steven Stillman (LMPG) wrote:
<snip>
> This does exactly what I need but is tediously slow. My use of egen means I
> am storing lots of unnecessary information (ie duplicate records) that I
> have no need for.
> I am pretty sure that this same idea can be used by looping over groups,
> calculating the sum, and storing this in only one observation per group. I
> haven't been able to figure out exactly how to do this myself and am hoping
> someone else will quickly see the light here. One problem is that summarize
> cannot be used to calculate the sum because it doesn't take non-integer
> pweights.
-help summarize- says that "aweights, fweights, and iweights are allowed;
see help weights. However, iweights may not be used with the detail
option."
If you have non-integer weights, then can't you use aweights or
iweights to calculate a weighted sum? [Your weights may be interpreted
as pweights when you need to derive variances for complex survey data,
but that is not the issue here.]
Stephen
=============================================
Professor Stephen P. Jenkins <[email protected]>
Institute for Social and Economic Research (ISER)
University of Essex, Colchester CO4 3SQ, UK
Phone: +44 1206 873374. Fax: +44 1206 873151.
http://www.iser.essex.ac.uk
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