Just in time for Xmas:

A revision of the #WhatIfBook is available.

With a brand new chapter on #CausalMediation.

We also made general improvements and corrected typos (Thanks!).
https://hsph.harvard.edu/miguel-hernan/causal-inference-book/

The first edition of "Causal Inference: What If" is expected in bookstores before the Summer of 2023. We'll keep a free version online.