st: difficulties entering start and end date in rolling

["Adrian Fath" <adriannhfath@gmx.de>]

Dear Statalist users,

I am using the "rolling" function and want to specify start() and end()
date. Having used both "sort" and "tsset" to make the data ready for
time-series analysis, I wonder how to enter those dates...2004m1 does
not work?! What does time_constant mean?

Cheers,
ADrian

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