Propensity Scores
Everything on Aqrab tagged Propensity Scores — grouped into one landing page so readers can go deeper by problem family instead of bouncing around the archive blind.
Overlap Weighting: When the Average Treatment Effect Stops Being the Honest Question
A practical guide to overlap weighting for clinical researchers. Covers why overlap weighting can stabilize observational comparisons, how it changes the target population, and what reviewers should demand before trusting a trimmed-looking causal claim.
Positivity & Overlap: The Assumption Your Causal Estimate Cannot Survive Without
A practical guide to positivity and overlap for clinical researchers. Covers common support, extreme weights, trimming, overlap-focused estimands, and why many causal analyses fail because treated and untreated patients barely resemble each other.
Inverse Probability Weighting: When PSM Discards Your Data
Why IPW outperforms matching by keeping all patients — and how extreme weights, positivity violations, and wrong variance estimators break published analyses silently.
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