Created
Nov 17, 2021 7:28 PM
https://chris-said.io/2019/05/18/variance_after_scaling_and_summing/
https://egap.org/resource/10-things-to-know-about-heterogeneous-treatment-effects/
https://cares-blog.gse.harvard.edu/post/understanding-matching-and-diff-and-diff/