itsa error: treatment periods not found in time variable: check trperiod()

[jungwon Min]

Hello,
After having the error in my data, I'm following the stata example: https://sites.google.com/site/metrics4real/home/test

sysuse cigsales_single, clear
tsset year

* Here we specify two treatment periods, starting in 1982 and 1989.
itsa cigsale, single treat(3) trperiod(1982 1989) lag(1) fig

I got an error message when I have two numbers in trperiod( ): Treatment periods not found in time variable: check trperiod()
The year variable has a numeric format. What should I do to fix the error? Thank you.

Jungwon

[Jared Greathouse]

1982;1989

EDIT: Why do an in time placebo in 1982?

[Emmi Obara]

Hello, was there any resolution to this issue? I am having the same error when I try to run an xtitsa model with two intervention points. The exact same code with only one intervention time point runs. trperiod(18 48) - there should be no comma in between, though I did try that as well. I have updated to the latest version of the xtitsa package.

[Rich Goldstein]

here is what I find in the help file:

Dates should be specified as human readible dates using the respective pseudofunction (see datetime), such
as trperiod(2020) for a four-digit year, or trperiod(2019m11) for monthly data. Multiple periods may be specified, separated
by a semicolon, as follows trperiod(2019m6; 2019m11)

so, first, you don't appear to be using "human readible [sic] dates" and second, you are not using a semicolon; note that this quote comes from version 2.6.0 of the user-written command (use -search- to find and download)