--- On Tue, 7/7/09, Lachenbruch, Peter wrote:
> I am particularly interested in this since I'm looking at
> some data for a multiple imputation in which we would
> like the continuous variables to be approximately normally
> distributed. Many are not. In looking for transformations
> to normality (boxcox), nothing seems to work. So my
> solution has been to group them into 5 or 6 categories and
> use ologit for imputation. The problem has been a huge
> excess of zeros.
Are these excess zeros a characteristic of the original data
or the result of the imputation?
-- 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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