I used the omit command.
Thanks a lot for your help!!
Gesendet: Montag, 15. Februar 2016 um 21:53 Uhr
Von: "Allin Cottrell" <cottrell@wfu.edu>
An: "Gretl list" <gretl-users@lists.wfu.edu>
Betreff: Re: [Gretl-users] help logit, stepwise regression
On Mon, 15 Feb 2016, Tomke Lindena wrote:

> after calculating an ordered logit regression I wanted to delete variables
> by using "stepwise regression", but it is not working. "data error"
> (Datenfehler!) occurs.
> I already had a look for the collinearity and deleted some variables
> (collinearity around 3) on my own and tried stepwise regression again, but
> still "data error".
> Is there a solution for my problem?

I guess you're using the "omit" command with the --auto option.

Looking at the implementation of that in the gretl source code I see
the comment, "FIXME this probably still needs work for estimators
other than OLS." So I'm afraid with ordered logit you've hit a case
that is not handled properly (the routine was getting confused by
the cut-point estimates).

Thanks for your report. This case is now fixed in gretl git and
snapshots. But we'll need to look into this more thoroughly -- there
may be some other estimators that are not handled correctly.

Allin Cottrell

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