This question evaluates a data scientist's skills in experimental design, causal inference, metrics selection, and handling allocation constraints for ad monetization incrementality.
After launching an AI chat feature, the company wants to show ads inside the chat experience (you are interviewing for an Ads/Monetization data science role). Advertisers have fixed budgets, so shifting impressions to chat may reallocate spend from other placements.
Design an experiment to measure the incremental impact of introducing chat ads.
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