System Design · Meta · Hard
Suppose you are analyzing advertising revenue and observe that the channel creation_source = 'web' generated more revenue in 2026 than in 2025. Design a causal analysis to determine whether most of this increase is truly incremental demand or whether it is primarily being diverted from the api and mobile sources. Your analysis plan should cover the following: Identification strategy: Select and justify one approach, such as a randomized geo-level budget shift,…
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