Counterfactual plot with staggered treatment periods

[zilunlin]

Hi Yiqing,

Thank you for this very helpful package.
I have a slight issue when I'm plotting the counterfactual graphs. I have staggered treatment periods in 2010 and 2012. When I plot the counterfactuals, the time line seems to clump together. I have attached a screenshot comparing when I have staggered vs single treatment period:

(1) Staggered intervention

(2) Single intervention period

Could this be a problem with the realignment of treatment periods? This could explain the spike in the earliest pre-intervention periods.

I have also attached the panel view of the staggered intervention periods:

Please let me know if there's anything else you'd need from me.

All the best,
Zilun