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 on April 23, and its replacement, statalist.org is already up and running.


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

Re: st: xtpmg command


From   Sami Alameen <samialameen@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: xtpmg command
Date   Fri, 16 Sep 2011 22:18:42 +0300

use the difficult option or change the algorithm option to another
than the default.

2011/9/16  <dyolcu@metu.edu.tr>:
> Hi,
> I'm trying to use Pesaran's pooled mean group estimator (with xtpmg
> command) for my unbalanced panel of N=125 T=50. For my baseline regression
> (with one regressor), I am getting the error of "could not calculate
> numerical derivatives ,flat or discontinuous region encountered". When I
> increased the number of regressors, this time stata can not terminate the
> iteration since the likelihood function is not concave.
> How can I solve this problem?
>
> Best regard,
> Duygu
>
> *
> *   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   |   Site index