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Re: st: RE: Error message with GMM command


From   lreine ycenna <lreine.ycenna@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: Error message with GMM command
Date   Mon, 6 Jun 2011 13:54:56 +0100

Hi Thanks!
I have it solved.
It has to do with 'year' having gaps.
Thanks again.

On 6 June 2011 13:42, Nick Cox <njcoxstata@gmail.com> wrote:
> Means no numerical observations to do that with. You need to look at your
> dataset to see where the problem is.
>
> Nick
>
> On 6 Jun 2011, at 13:27, lreine ycenna <lreine.ycenna@gmail.com> wrote:
>
>> No observations.
>> r(2000);
>>
>> using 'xtabond2 y L.y a b c axb axc, gmm (y b c) iv (a) two robust small'
>>
>> :S
>>
>>
>>
>> On 6 June 2011 13:08, lreine ycenna <lreine.ycenna@gmail.com> wrote:
>>>
>>> I've just done the update.
>>>
>>> I dont understand why 3 other error messages appear after the GMM
>>> command:
>>>
>>> xtabond2 y a b c axb axc, gmm (y b c, eq(diff)) iv (a, eq(level)) two
>>> robust small
>>>
>>> estimates post: matrix has missing values
>>>                stata():  3598  Stata returned error
>>>        xtabond2_mata():     -  function returned error
>>>                <istmt>:     -  function returned error
>>> r(3598);
>>>
>>> xtabond2 y a b c axb axc, gmm (y b c, eq(diff)) iv (a, eq(level)) two
>>> robust small
>>>
>>> It syas that matrix has missing values?
>>> I'm using longitude panel data, so I wonder if there's anything on the
>>> format of my data I need to set up first that I
>>>
>>>
>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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