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Re: st: Use of weights from Current Population Survey, March Supplement

From   Austin Nichols <>
Subject   Re: st: Use of weights from Current Population Survey, March Supplement
Date   Thu, 15 Apr 2010 12:51:05 -0400

Mónica Guadalupe Chávez Elorza <>:
Surveys, including the CPS, have pweights.  See help weights and help svy.

They are also stratified and clustered, though the CPS does not
identify strata and clusters.
You can reverse engineer clusters (the most important piece), however.
Find a paper by Davern et al in Inquiry on CPS clustering comparing
an approximation to using the actual clustering variable.

2010/4/15 Mónica Guadalupe Chávez Elorza <>:
> I am using Stata 11.0 to analyze the Current Population Survey.
> Specifically, weights on this survey are nonintegers, therefore when
> using frequency weigths - fw=marsupwt- sends the following message:
> may not use noninteger frequency weights.
> I came out with two options, but which should I used? and Why?
> 1. To use the importance weight -iw=marsupwt-, which allows the use of
> noninteger values, or
> 2. To generate a new weight, rounded to the nearest integer and that
> for those values that are negatives, values are set to zero.
> Any recommendations about the use of either option? Thanks!

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