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st: xtabond returns "no observations"

From	"A.S. Feng" <asf30@cam.ac.uk>
To	statalist@hsphsun2.harvard.edu
Subject	st: xtabond returns "no observations"
Date	03 Jul 2004 13:12:59 +0100

Dear Listers,

I have a Summers-Heston panel data set with six periods (1960, 1965...1985) and 138 countries (some missing observations).

I am trying to run an Arellano-Bond estimation with one lagged dependent variable.

Having tsset, i tried to regress, but it replies "no observations".

Is it because I have too few periods? Or is there something wrong with the data?

Thanks a lot.

Andy
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