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https://twitter.com/PHuenermund/status/1251953408497668096PSM is a method with a lot of critiques. They fall into 3 basic camps: 1) propensities are bad 2) matching is bad 3) both propensities and matching are inadequate no matter how you use them b/c omitted variables 2/
There’s a fundamental difference in how econ deals with clustered/multilevel data and how most other fields do stemming from early intro of ANOVA into the field in the 1960s panel data 2/
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by @LauraEllenDee view original on Twitter