[Mateus Maciel]

I could solve the issue by running the following:

update all, force

A special thanks to Pei-Chun from the Stata support and Fernando.

[Kagiso Matswalela]

Dear FernandoRios

After running the jwdid command, variables such as _etr_ and _tr_are created. How do we interpret these?

[FernandoRios]

those are the "internally" created variables. They are used to create the event-like study estimates. and to identify the effectively treated observations. You do not need to interpret them.

[Kagiso Matswalela]

Thank you

[Mustafa Caliskan]

Hi FernandoRios. Is there any option like CSDID long or long2 to avoid pretrend problems in JWDID?

[FernandoRios]

by default, if you use "never" as control group, results will be similar to long2
And, if you have pre-trend problems, there is no way to avoid them. they simply exist