st: tsset in xtabond2

[<suryadipta.roy@lawrence.edu>]

Hi,

I am trying to do a panel GMM estimation (using xtabond2 
in Stata) using regional grouping dummies instead of 
country dummies and the xtabond2 command needs the data to 
be tsset. Thus, tsset (country-id year) is not what I want 
and tsset (region-id year) is not working. Obviously, it 
says "repeated time values within panel".

Can someone kindly help me with the right command for 
tsset? Is tsset (year region-id) correct for my purpose?

Thanks!
Suryadipta.


*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/