Mediation Analysis: Can We Ever Identify Indirect Effects?

Machine Learning or Economic Theory? The Debate Over Covariate Selection in Applied Economics

Reduced Form vs Structural Models: Do We Need Theory for External Validity?

Treatment Effect Heterogeneity: Feature or Bug in Policy Evaluation?

Should Long-Run Effects of Short-Run Interventions Be Trusted?

Clustering Standard Errors: When, Why, and At What Level?

Pooling vs. Stratification: Should Policy Evaluations Report Subgroup Effects?

The Replication Crisis in Economics: Beyond Pre-registration

Is Every "Natural Experiment" Really Natural? Scrutinising the Exclusion Restriction

Selection on Parallel Trends: The Hidden Assumption Behind Conditional DiD

Machine Learning versus Structural Models: Two Visions of Policy Counterfactuals

Publication Bias and the File Drawer Problem: Are Published Effect Sizes Too Big?

Synthetic Control vs. Difference-in-Differences: When to Use Which?

Should Covariates Always Be Included in Randomised Experiments?

The Parallel Trends Assumption: Testable, Credible, or Dogma?

RCTs vs. Observational Studies: Is Randomisation the Gold Standard?

Pre-registration and Researcher Degrees of Freedom: Does Economics Have a Replication Problem?

External Validity: Are Local Average Treatment Effects Policy-Relevant?