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Tools

Interactive simulators from the essays. Each one is small, honest, and runs entirely in your browser.

  1. 01 Geo Test Power Calculator How many DMAs does a geo experiment need before it can detect your lift? Tune market count, expected lift, and noise to find out. Open
  2. 02 Anomaly Detection Playground Global z-score, rolling window, seasonal decomposition. Same series, very different alarms. Tune the threshold and compare. Open
  3. 03 Difference-in-Differences Visualizer See how a violation of parallel trends poisons the naive estimate, and how DiD recovers the truth. Open
  4. 04 Causal Method Picker Answer a few questions about your situation; get a recommendation from my working causal-inference playbook. Open
  5. 05 Attribution Model Simulator Build a customer journey, then watch five attribution models fight over the credit for one conversion. Open

No tracking, no backend. Every tool is plain client-side JavaScript, and each links back to the essay it came from.