Threading The Needle

Incrementality tests are “in”… but the real problem is what you do after the read.In this episode, Taylor sits down with Olivia Kory (Chief Strategy Officer at Haus) and George Davis (CMO at Cozy Earth) to unpack the messiest part of modern measurement: operationalizing incrementality when results swing, channels conflict, and “platform ROAS” can’t be trusted.If you’ve ever asked:“Our holdout came back way lower than Meta… now what?”“Why don’t test results replicate month-to-month?”“How do I actually use an incrementality factor in real budget decisions?”“If everything is under 1.0 iROAS… should we cut spend or keep investing?”…this one is for you.What we coverWhy incrementality requires a holdout (and why “spend up / spend down” isn’t enough)The replication problem: why results change even with “clean” testsThe gap between measurement and optimization (platforms optimize for attribution, not incrementality)How operators use incrementality factors without letting them become a blunt instrumentWhy channel vs.