Causal Inference: the Mixtape, the new unconfoundedness chapter (Taylor's version)

Listing out all the changes I'm planning on the unconfoundedness chapter

Apologies for two posts in same day — I messed up the automatic scheduling.

When I got the contract to write a revision to the Mixtape, I was excited, and I still am. But I am behind, and it was partly caused by (I think I said this already) dropping the probability and regression chapter. But many people, particularly those in industry, said the regre…