Hello,
Thanks!
I tried adding one option "maxldep(0)" to the command.
Because I don't want to use one lag of dependent
variable on the right hand side of the equation as
instruments. But the second observation is still
missing.
(Arellno and Bond only use lagged values of the levels
of the regressors as instruments.)
Could someone tell me how to make the second
observation on each panel not missing?
Many thanks in advance!
Emily
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