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ROAS & Incrementality

3 min read

The fastest lift read before a budget call

An hour before a budget call with no measurement in place. What you can honestly produce, how to caveat it, and the three claims that will collapse under questioning.

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Quick Answer·3 min read

The fastest lift read before a budget call: An hour before a budget call with no measurement in place. What you can honestly produce, how to caveat it, and the three claims that will collapse under questioning.

Read the full article below for detailed insights and actionable strategies.

Channel comparison

Platform-reported vs. causal contribution

Platform-reported numbers double-count assists; causal inference reveals reality

Platform reported
Causal (true)
Pinterest-63% undercredited
0.9x
2.4x
Meta Ads+81% inflated
3.8x
2.1x
Klaviyo+188% inflated
15.0x
5.2x

With an hour before a budget call and no measurement in place, you can produce two things honestly: a claim ratio and an observational per-channel read. You cannot produce a lift test, and claiming otherwise is the fastest way to lose the room.

What fits in an hour

OutputTimeWhat it supports
Claim ratio20 minutes"Our reported ROAS contains double counting, here is how much"
Observational read10 minutes plus the export"Here is a per-channel estimate and how sure it is"
A named list of unmeasured channelsFalls out of the read"These three we cannot resolve at current spend"
A lift test resultNot possibleNothing

The claim ratio is the highest-value twenty minutes because it needs no tooling. Total your store revenue for the window, sum what each ad platform claims for the same window, divide. A ratio above one quantifies the overlap in your reporting, and the method is in the claim ratio walkthrough.

The observational read

Export the acquisition window from Google Analytics and run it. Causality Engine returns a per-channel estimate with its confidence interval, its coverage share of your orders and an observational design label, from a €99 one-time upload, refundable if it does not move a budget decision. That is the honest ceiling on what an hour buys.

Before you walk in, look at the intervals rather than the ranking, and be ready to name the widest one yourself. Volunteering the weakest part of your own evidence is the single most effective thing you can do for its credibility.

The three claims that will collapse

Do not say "we tested this". You did not; you read observed variation. Do not say "this channel is definitively unprofitable" when the interval spans break-even. And do not present a channel below the measurable floor as though it had a real estimate; name it as unmeasured, which is covered in the measurability floor.

Each of those survives about one follow-up question, and the person asking will remember that it did not.

What to actually ask for in the meeting

Not a verdict. Ask for two things: permission to hold the largest channel steady for a fortnight so a proper read is possible, and agreement on the threshold that would justify a cut. That converts a defensive meeting into a plan, and it is a much easier ask than a budget change.

If the meeting is genuinely about cutting something today, the defensible version of that argument is set out in the attribution report that tells you which channels to cut.

The part worth remembering

An hour of honest work beats a week of confident work, because the honest version survives the second meeting. The interactive demo is a five-minute way to see what the output looks like before you commit to showing it to anyone.

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Sixty-second versions of these ideas: Causality Engine on YouTube Shorts.

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