Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: AW: clogit, "initial values not feasible" error


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: AW: clogit, "initial values not feasible" error
Date   Wed, 16 Dec 2009 14:34:10 +0100

<> 


" In searching through precedent posts on the topic, i found a
reference to a possibility to feed results from an OLS estimation into
a clogit estimation. How can one do this? do you think it would help?"

Post the link to the post in question as a first step!


HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von joachim jarreau
Gesendet: Mittwoch, 16. Dezember 2009 14:26
An: statalist@hsphsun2.harvard.edu
Betreff: st: clogit, "initial values not feasible" error

Hi statalist,

I am trying to fit a conditional logit model on some 160,000 obs.;
there are about 150 groups spanning 11 years. In the specification Id
want to include 3 additional sets of fixed effects; so that the
command line is of the type :

clogit export x1 x2 x3  provd* secd* yeard*, group(country)

where "export" is a binomial variable for positive exports in a given
sector and year, from a province to a given country. "provd", "secd"
and "yeard" are corresponding sets of dummies.
I get "initial values not feasible" (r1400) as error message.
Ive got two questions:

- What is the critical aspect that makes this specification to heavy
to implement/prevents convergence? what should I cut? Do you think
there are too many observations, too many dummy variables, or both?
(Im am trying these alternative solutions, but any indication
concerning a preferred direction to search would be helpful).

- In searching through precedent posts on the topic, i found a
reference to a possibility to feed results from an OLS estimation into
a clogit estimation. How can one do this? do you think it would help?

Thank you in advance for any advice.

Cheers,

joachim
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index