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st: RE: Couldn't Create Lag Variable in STATA
I can't reproduce this problem.
In any case, these look like panel data. Check
out -tsset- and the L. operator for lag variables.
That's usually better than using [_n-1].
> I have a dataset I couldn't create lag variable. The details
> are as follows:
> It is a variable for each state and each year. So what I did was:
> sort state year
> gen V1=V[_n-1]
> However, what I got in STATA is
> weights not allowed
> Anyone have any idea what is going on? How can I create a lag
> variable in this case?
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