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Why Your Attribution Model Needs a Control Group

Why Your Attribution Model Needs a Control Group

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Episode 32 of Marketing Analytics with Fexingo dives into a foundational flaw in many attribution models: the lack of a true control group. Lucas and Luna examine how Unilever's 2023 ice cream campaign in Brazil used a geo-based holdout to prove that their digital spend drove only 12% incremental lift, not the 35% their last-click model claimed. They walk through the mechanics of matched-market experiments, the minimum sample size for statistical significance, and why a control group is the only way to separate correlation from causation. If you've ever wondered why your attribution dashboard shows a high ROAS but your revenue flatlines, this episode gives you the diagnostic tools to find the gap. Listeners learn one concrete number: a properly designed control group can cut attributed conversions by 20 to 50 percent on average, revealing which channels actually move the needle. #MarketingAnalytics #Attribution #ControlGroup #Incrementality #Unilever #GeoHoldout #CausalInference #A_BTesting #MarketingROI #LastClick #DataDriven #CampaignMeasurement #HoldingOut #StatisticallySignificant #Marketing #BusinessPodcast #FexingoBusiness #AttributionModel Keep every episode free: buymeacoffee.com/fexingo
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