What changed after the policy?
Difference-in-differencesΔYᵀ − ΔYᶜ
Read the policy effect
- Compare groups
- Check trends
- Estimate change
THE CAUSAL INFERENCE WORKSPACE
Good questions.
Credible answers.
Find a method for your question. Follow the analysis, inspect its evidence, and discuss every step.
THE METHOD STUDIO
01 / 03
What happens at the cutoff?
Regression discontinuityμ₊(c) − μ₋(c)
Compare the two limits
- Find the cutoff
- Compare nearby
- Estimate the jump
Who benefits most?
Causal forestτ(x) = E[Y₁ − Y₀ | X=x]
Inspect effect variation
- Describe features
- Learn effects
- Check heterogeneity
A world of methods.
COMMUNITY ATLAS- Method guides
- 68
- Research fields
- 10
THE OPEN NOTEBOOK
Explore the methods.
68 workflows/10 fields of inquiry
IV with heterogeneous effects: the LATE (ivreg)
The idea
Two-stage least squares for instrumental-variables regression, with the modern LATE interpretation and rich diagnostics.
FIGURES
Instrumental variables & 2SLS for an endogenous treatment (ivreg)
The idea
When treatment is endogenous, an instrument identifies the complier (LATE) effect via two-stage least squares — after you check the instrument is strong.