As someone who works with causal inference most days, I expected to find much fault with this article. I was pleasantly surprised to find how rigorous the artic

As someone who works with causal inference most days, I expected to find much fault with this article. I was pleasantly surprised to find how rigorous the article is, despite some other comments here. For more information on the role of randomization in causal inference (experimental and observational), I recommend the books by Paul Rosenbaum, especially, "Observation and Experiment".