Hi there
I come to another questions. In the original spss data, there are three
kinds of weights. One is gender weights, oen is rural-urban weights,and
another is the combination of gender and rural-urban weights. What is
the application difference between these three weights?
I am not familiar with the spss data. So I am also confused regarding
what should I use in stata. The outputs have shown that the weights are
noninteger, so that I could not use fw. Then between aw and pw, which
one should I use?
Thanks.
Lijun
---------- Original message ----------
From: [email protected]
To: [email protected]; [email protected]
Sent: Wednesday, March 10, 2004 1:44:46 PM
Subject: Re: st: how to weight
At 01:29 PM 3/10/2004 -0500, Lijun Song wrote:
>Hi All,
>
>I just transfered one data from spss into stata. The original spss data
>ever are weighted. After transference, however, the stata data are not
>weighted. How to weight the resultant stata data, then?
Type -help weight-. In SPSS, you might have
weight by wgt
regression....
In Stata,
reg y x [fw = wgt]
For better or for worse, SPSS lets you give the weight command once and
it
then holds for all subsequent procedures; Stata makes you keep on
repeating
the weighting as a parameter on your commands (unless you happen to be
using the svy commands). But, Stata's weighting features are more
powerful
than what is available in SPSS.
Also, depending on what kinds of weights you are using, the -expand-
command can be used to expand the data set. This is handy if, say, you
are
analyzing data that has been collapsed into a table, and the weights
represent the cell frequencies.
-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
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WWW (personal): http://www.nd.edu/~rwilliam
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