Chapter 7: Clarification

[AngieC96]

Hi there!
I think there is an issue on chapter 7, in the following paragraph:

Knowing this, if we remove the zeros, we will keep the never zeros on both the treated and the control group. But we would remove from the control those that flip from zero to not zero with the treatment.

It's a bit confusing in my opinion, because here I think we are talking about counterfactual, so I would write:

Knowing this, if we remove the zeros, we will keep the never zeros on both the treated and the control group. But we would remove from the control those that would have flipped from zero to not zero if they would have been given the treatment.