Matching, missing data, a quasi-experiment, and causal inference--Oh my!

Context I have a project for work where the goal is to compare two non-randomized groups. One group received an experimental intervention, and we’d like to compare those folks to their peers who were not offered that same intervention. We have easy access to data from folks from the broader population during the same time period, so the goal isn’t so bad as far as quasi-experiments go.1 The team…