st: help

[coppini@uniroma2.it]

Hi,
I using panel data and when I use the comman xtreg I have this error: Return
code 2001
insufficient observations;
another problem that I have is when I using the command by country: xtprobit,
the error is: num of quadratue points must be less than or equal to numberof
obs.
is not 16 the default?
thank you very much

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