I'm trying to cnduct an event study accross countries, where sometimes there is more than one event per country.
I'm following the methodology explained here to compute $CAR_i$.
From what I understand, I can use one event per country if I'm following the formulas.
What should I do if I have more than one event per country, should I compute the $CAR_i$ for each event and then create an average ?
Thank for your help !