I know that a command like:
local i = var[`n']
can obtain the nth observation's value into macro i. But my data is a
panel data and I want the nth observation within a certain group into
the macro i, instead of that of the nth observation in general.
Obviously, "local" cannot be used with "by" and I could not figure out
a way to do this. If any one has any idea on this, I would really
appreciate.
Thanks!
Robin Luo
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