Propensity Score Methods

1. Thomas L, Li F, Pencina M. Using Propensity Score Methods to Create Target Populations in Observational Clinical Research. JAMA. 2020 Jan 10.
2. A nice 11.5 minute video for inverse probability weighting (IPW) at https://www.coursera.org/lecture/crash-course-in-causality/intuition-for-inverse-probability-of-treatment-weighting-iptw-nrrCT. The rest of this free on-line course from the University of Pennsylvania also seems worthwhile.
3. The work of Fan Li at Duke https://www2.stat.duke.edu/~fl35/OW.html in general, on which there is an accessible tutorial on overlap weights that includes binary, multiple treatments, subgroup analysis, code demo, and real examples [OW Tutorial]