Did the event create revenue, or just move it?

Causal inferenceHard

Problem. A limited-time event drove a clear revenue spike. Leadership wants to roll out more events. How do you tell whether the event created incremental revenue or merely pulled forward spend that would have happened anyway?

Before you reveal: say your answer out loud, as if you were in the real interview — get your reasoning across clearly first. There is no single correct answer: reading what the interviewer is really after and defending your own thinking is what makes an answer strong.

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