UPDATE: Edwin Leuven was kind enough to comment on my post and has a much better explanation of the weight situation: If you’ve ever used psmatch2 in Stata, you know that it has one of the least useful help files ever created. I’ve always been frustrated with not understanding how the weights in psmatch2 are calculated, so I decided to sit down and figure it out. After running...
Power analyses for matching
A colleague at RTI asked me about power analyses for PSM, specifically, should he assume dependent samples for his power analysis? Recall that with dependent samples, we pair observations at the analysis stage. For example, we might calculate the change over time for two observations of the same individual, or compare husbands’ and wives’ perception of their marriages. With matching...
Matching and complex survey data
Several people have asked me about using propensity score matching with complex surveys, and whether/how weights, PSUs and strata should be taken into account. This paper explains how to handle these issues.
A brief introduction to propensity score matching
I recently started a quant methods working group at the College of Education here, and gave a presentation on propensity score matching for people who had heard about it and wanted to know more.