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st: importance weights


From   "B. Burcin Yurtoglu" <burcin.yurtoglu@univie.ac.at>
To   statalist@hsphsun2.harvard.edu
Subject   st: importance weights
Date   Wed, 19 Feb 2003 11:48:45 +0100

Dear All,

The use of "importance" weights seems to increase the number of observations in 
the regress command.

E.g.

reg y x

produces an output say with 8 observations

whereas 

reg y x [iw=1/weight]
produces an output with 17 observations

Does anybody have an explanation or suggestions for reading?
Best regards
burcin
Dr. B.Burcin Yurtoglu
University of Vienna, Department of Economics
BWZ, Bruennerstr. 72
A-1210, Vienna
Phone: + 43 1 4277 37482
Fax: + 43 1 4277 37498
http://mailbox.univie.ac.at/~yurtogb5/

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