Setting control variables for xtlogit or xtmlogit

[Henry Selt]

Dear Statalisters,

I'm working on a dataset that contains closing data for companies and a binary variable for a few of them if the company was acquired.
The data is in panel data.
I want to use xtlogit or xtmlogit to check what data from the balance sheet is used by firms to decide whether to buy or not buy a firm.
For all this I want to use a control variable for the year in which the closing data was released.
But I don't understand how to do this.
xtset panelvar timevar is what I use to define the panel data.

Thanks for your help in advance.

[George Ford]

is there a variable indicating when the closing data was released?

[Henry Selt]

Yes, the variable closing_year contains the year of the closing data.

[George Ford]

"For all this I want to use a control variable for the year in which the closing data was released."
I'm not exactly sure what you mean. You have a variable indicating the control year and it is a variable.

[Henry Selt]

Sorry for my bad description. I want to control my study for the effect of a different closing year. Because the closing year is not of interest to my study's objectives, but I want to control it because it could influence the outcomes.
Do you understand this explanation?

[George Ford]

can you just add closing_year as a regressor? or do you want a dummy for closing year?

[Henry Selt]

I don't know which possibility is better. But I prefer a dummy variable.

[George Ford]

dummy is just
bys id: g close_dummy = year==close_year

or if you want all years after close_year
bys id: g close_dummy = year>=close_year

[Henry Selt]

Okay thanks a lot George!