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st: RE: Help using xi: with xtreg
Stata is objecting to the the period, which
perhaps should be an asterisk.
> I'm having problems using the expansion interaction with xtreg. I am
> attempting to include cross-sectional specific trend terms in my
> regression. Each time I get a r(101) time series operators not allowed
> error message.
> Here is my specification:
> xi: xtreg y x1 x2 i.post*x1 i.crossectionid.trend,xtreg
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