[Limdep Nlogit List] Ordered probit with sample selection
wgreene at stern.nyu.edu
Fri Mar 6 01:51:52 EST 2009
Valentina. It looks like there are no observations with y=0
in the selected sample.
----- Original Message -----
From: "Valentina Tartari" <v.tartari at imperial.ac.uk>
To: "limdep at limdep.itls.usyd.edu.au" <limdep at limdep.itls.usyd.edu.au>
Sent: Thursday, March 5, 2009 9:38:47 AM GMT -05:00 US/Canada Eastern
Subject: [Limdep Nlogit List] Ordered probit with sample selection
I am trying to estimate an ordered probit model with sample selection. The first step (probit) works fine, however when I try to run the second step I get this message: "Error 128: Models - Insufficient variation in dependent variable".
My dependent variable is coded 0,1,2,3 and if I run an ordered probit without the selection it works fine.
Any idea of what can be the problem?
Thank you a lot
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