Hello Thomas,
Since there is no time aspect to the data, I would simply treat the ID
variables as a nominal variable. This would be roughly equivalent to
including fixed effects. If these IDs are not missing, this is an
especially appealing approach.
Hope that helps,
matt.
On Fri, Sep 18, 2009 at 1:21 PM, Toma9 Kubi9 <tomas.kubis(a)gmail.com> wrote:
Hi,
I would like to ask a question regarding a dataset with survey data in which
each person has an id. There were different objects evaluated with the same
set of categorical variables. Thus a person occures in the data more times
and thus more rows have the same id. Should I set this variable as ids =
"id" or cs="id". Or do you think it is ok to treat this id as a
normal
variable, i.e. not to make any special settings? Thanks.
Best regards,
Tomas
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