Thanks, i`m going to read it
> Hi,
>
> There is a recent paper by Bun and Kiviet "The Effects of Dynamic
> Feedbacks on LS and MM Estimator Accuracy in Panel Data Models",
> forthcoming in Journal of Econometrics. This one explains that there
> are cases where the difference GMM can do better than the system GMM.
>
> However, with only 20 countries it is very unlikely to get sensible
> results regardless of the GMM estimator you use. This is because the
> virtue of using GMM is in large samples. You may be better off by using
> the xtlsdvc command which refers to Kiviets bias corrected estimator.
>
> Best
>
> Vasilis
>
>
> On Feb 7 2006, [email protected] wrote:
>
>>Dears,
>>I have a panel dataset for a sample of 20 countries over 8 periods I`ve
>> use GMM method to estimate a model of convergence like this
>>yit=b yit-1 + q xit + uit
>>where xit are exogenous variables
>>I could be posible that difference GMM work better than sysyem GMM?
>> Thanks
>>
>>
>>
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>>
>
> --
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>
>
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