Policy Evaluation
Everything on Aqrab tagged Policy Evaluation — grouped into one landing page so readers can go deeper by problem family instead of bouncing around the archive blind.
Stochastic Interventions: When “Treat Everyone” Is Not the Policy Question
A practical guide to stochastic interventions for clinical researchers. Covers when deterministic treatment rules become unrealistic, how probability-shift interventions preserve positivity, and what reviewers should demand before trusting policy-effect claims.
Interrupted Time Series: Strong Quasi-Experiments Need More Than a Before-and-After Plot
A practical guide to interrupted time series for clinical researchers. Covers level and slope changes, segmented regression, seasonality, autocorrelation, controlled ITS designs, and why a vertical line on a chart is not a causal estimate.
Synthetic Control Methods: Building Counterfactuals When DID Fails
How to construct a synthetic twin from donor pools when parallel trends don't hold. Covers SCM optimization, validation via placebo tests, modern extensions (ASCM, SDID), and common pitfalls.
Difference-in-Differences: A Practical Guide for Clinical Researchers
When and how to use DID in clinical research. Covers parallel trends, staggered adoption, common pitfalls, reporting checklist, and modern estimators.
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