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st: Re: RE: may not use time-series operators on string variables
But Why shoud my variable be numeric, that is not reasonable. In fact, my variable is industry code, never ever be numeric.
I do not think Nick's answer helpful
In this aspect, i think stata should admit its shortcomings and fix the problem asap
----- Original Message -----
From: "Nick Cox" <email@example.com>
Sent: Wednesday, July 03, 2002 9:53 PM
Subject: st: RE: may not use time-series operators on string variables
> Lee Chuntao
> > In my dataset there is a variable v1, which is a string
> > variable. I try to use l.v1, after i set the time variable (eg,
> > tsset time). I don't know why stata do not permit timeseries
> > operators on string variables, it seems not reasonable for the
> > lag or lead operators, beyond the difference operators
> > i wonder if there is some sort way so that i can use the laged
> > string variable?
> Yes. -destring- your string variable first. Stata quite reasonably
> wants you to have your variables with numeric meaning held as numeric.
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