[Limdep Nlogit List] panel tobit model

[William Greene]

Dear Ms. Qui:  Assuming the grpsize variable is set up correctly, then
(1) No, with only two iterations, the RE model has not been estimated and
(2) You should rethink the random effects specification.  This outcome is 
not due to a failure of the program. It occurs if the RE model is the wrong
model for the data.
Regards,
Bill Greene

************************************************
Professor William Greene
Department of Economics
Stern School of Business
New York University
44 West 4th St., Rm. 7-78
New York, NY   10012
Ph. 212.998.0876
Fax. 212.995.4218
URL. http://www.stern.nyu.edu/~wgreene
Email. wgreene at stern.nyu.edu
************************************************

----- Original Message -----
From: ecptq at bath.ac.uk
Date: Sunday, May 20, 2007 3:24 pm
Subject: [Limdep Nlogit List] panel tobit model

> Hi, everyone,
> 
> I am running the random-effects tobit as follows:
> 
> tobit;lhs=body;rhs=one,X;pds=grpsize$
> 
> It comes the results with:
> Error:   806: Line search does not improve fn. Exit iterations. 
> Status=3
> and the table shows iterations completed = 2.
> 
> Are the results of this random-effects tobit still reliable, and is
> there anything I can do about it?
> 
> Thanks in advance.
> -- 
> Miss Tian Qiu
> Department of Economics and International Development
> University of Bath
> Tel.: (01225) 384864
> 
> 
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