Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and running.


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

Re: st: xtlogit: panel data transformation's recast to double makes model incomputable


From   Maarten Buis <maartenlbuis@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: xtlogit: panel data transformation's recast to double makes model incomputable
Date   Tue, 2 Apr 2013 14:42:21 +0200

On Tue, Apr 2, 2013 at 2:24 PM, Tom wrote:
> How is Nick's suggestion a solution when the objective is to figure
> out the significance over the other independent variables on my
> dependent variable? Merely using two variables is not going to give me
> any useful information.

It tells you which variables cause the trouble. Now you can look at
the distribution and associations of these variables and see why they
cause trouble. Also consider how the data were collected, e.g. if this
is a survey look at the exact questions and answer categories and if
this question was asked to all respondents. Once you know why, you can
think of a solution.

> Insofar noone has explained why the computation is unsuccessful. It'd
> be especially helpful if someone could explain why less precision
> would allow the maximizer to do it's job.

As I said before: Your assumption that the problem is the precision of
the transformed variables is incorrect as -xtlogit- does not perform
that transformation. You really need to go through the process
discussed above.

-- Maarten

---------------------------------
Maarten L. Buis
WZB
Reichpietschufer 50
10785 Berlin
Germany

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


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