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st: Grouping firmid or not to tsset data ?
From
"Abdalla, Ahmed" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: Grouping firmid or not to tsset data ?
Date
Mon, 20 Jan 2014 19:03:30 +0000
Dear Statalist
I have a panel id (permno) and two time variables (yr) and (mth) and want to tsset my panel based on permno yr mth
I run:
gen timeid = ym(yr, mth)
gen firmid=group(permno)
tsset firmid timeid
//I get the error message -repeated time values within panel
when I run tsset permno timeid
//it works properly.
I changed my data set, and used another data set to rule out any problems with my data, however still get the same results !
Can I tsset when only the time variables are grouped in one timeid and the firmid is not grouped ? Is it correct?
Thanks
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