Estimate Portal’s causal lift on video-call usage
Company: Meta
Role: Data Scientist
Category: Statistics & Math
Difficulty: medium
Interview Round: Technical Screen
Overview: Estimate the causal effect of buying a home video-calling device on how much people video-call, using call logs and purchase dates with no randomized experiment. Cover the estimand, a staggered-adoption difference-in-differences design, and power, with self-selected buyers and shared household devices as the complications.
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