st: how to get a list of id's used in panel regression?

["Dithmer, Jan" <jdithme@food-econ.uni-kiel.de>]

Dear Statalist,

I am currently performing a panel analysis using xtabond2 and, depending on the variables included, the number of groups used in the regression varies.
is there an easy way to get a list if the groups (id, for example countries) used in a regression after having performed the estimation?

Thank you very much in advance...

Best, Jan

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