Most of your weights are < 1, which is a sign of trouble, though
maybe not yours. These observations do not even represent themselves.
-Steve
On Mar 12, 2009, at 8:00 AM, Paula Albuquerque wrote:
Dear Maarten,
Thank you for your answer.
I find no negative weights and I don't think there are any
exceptionally large ones.
The summary statistics for multipli (the weights) are the
following, do you see anything suspect?
multipli
-------------------------------------------------------------
Percentiles Smallest
1% .1380898 .1380898
5% .1640099 .1380898
10% .2761796 .1380898 Obs 310
25% .3280198 .1380898 Sum of Wgt. 310
50% .4142693 Mean 1.057564
Largest Std. Dev. 1.143596
75% 2.149237 5.803271
90% 2.308206 5.880583 Variance 1.307813
95% 2.44962 6.582238 Skewness 1.956393
99% 5.803271 6.964251 Kurtosis 8.15605
Paula
One thing that jumps to mind is that you that there may be
something wrong with your weights. Try typing:
-sum weight, detail- (where weight needs to be replaced with
the variable name of your weight variable), and see if you
have any negative weights or if there are some exceptionally
high weights.
-- Maarten
-----------------------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
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