Shi,
It seems to me that you are using -svylogit-... right?? Check in the manual
the formula related with the weight that you are using. I am guessing that
the weights are independent of the number of variables. Therefore, you can
run -sw logit- using weights. Example: (1) Suppose that you are
using -svyset [pw=wt], then create a new variable that describe the weights
(weight is a fair name), (2) Check that -svylogit y x1 x2- gives you the
same as -logit y x1 x2 [pw=weight]-, (3) Run your model as -sw logit
[pw=weight].
I hope this helps
Rodrigo.
----- Original Message -----
From: "Shi Huang" <[email protected]>
To: <[email protected]>
Sent: Tuesday, September 12, 2006 11:02 AM
Subject: st: SW logisitc
Hello,
I am doing backward logistic regression with survey data.
Unfortunately, SW is not supported by svy. Which means I have to do
this manually. According to
http://www.stata.com/support/faqs/stat/lrtest.html, backward LR is not
appropriate if I understand correctly. So I have to use backward
Wald. Anybody can help me how to get Wald test? Or any command to do
this?
Thanks so much,
Shi
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