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Re: st: xtpmg command
From
Sami Alameen <[email protected]>
To
[email protected]
Subject
Re: st: xtpmg command
Date
Sun, 18 Sep 2011 13:45:44 +0300
Or you might check if there are gaps in the panels, try a set some
other variables from the same data set to see if there is a problem
with particular variables!
On Sat, Sep 17, 2011 at 10:07 PM, Biljana Jonoska
<[email protected]> wrote:
> Hi,
> I would make an suggestion to check whether each of the panel units has
> its own unique identification. Some records could be left without assigned proper identification.
>
>> To: [email protected]
>> Date: Saturday, September 17, 2011, 9:07 AM
>> > Thank you Sami, I tried appr the
>> problem continues.
>>
>>
>> use the difficult option or change the algorithm option to
>> another
>> > than the default.
>> >
>> > 2011/9/16 <[email protected]>:
>> >> 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/
>> >
>>
>>
>> *
>> * 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/
>
*
* For searches and help try:
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