Estimate Portal’s causal lift on video-call usage
Company: Meta
Role: Data Scientist
Category: Statistics & Math
Difficulty: medium
Interview Round: Technical Screen
Quick Answer: This question evaluates applied causal inference and statistical analysis skills, including defining estimands, designing staggered-adoption difference‑in‑differences/event‑study regressions with fixed effects, propensity‑based selection control and matching/weighting, power analysis for low treated share, and robustness and sensitivity checks.