Step one
Data
Every dataset gets a readiness verdict before anything is fit. A fit takes minutes and produces confident-looking numbers whether or not the design could ever have identified them — so the question of whether it could is asked first, and costs a second.
Drop a CSV here, or click to choose one
One row per period, or per geography and period. Column roles are guessed on arrival and every guess is yours to overrule.
Your uploads
Bundled datasets
Synthetic, generated from a fixed seed, and shipped with the true ROIs that produced them — so the model can be graded against an answer key rather than only against itself.
national_demo
Four years of weekly national data for a ~$150M revenue retailer across six paid channels. Well-posed: enough history, distinct flighting patterns, and an observable demand proxy. This is the reference dataset for parameter recovery.
208 × 1 · 6 channels
answer key
geo_demo
Three years of weekly data across 25 geos with a conversions KPI and a varying revenue-per-conversion. Cross-sectional variation is what lets the hierarchical model identify effects a national time series cannot.
156 × 25 · 6 channels
answer key
hard_case
Two years, nine channels, three near-duplicate spend pairs, minimal independent variation, and a weak demand proxy. Roughly 2.3 observations per parameter — well under the 4x minimum. The readiness report is expected to return No-go.
104 × 1 · 9 channels
answer key
messy_upload
Three years of weekly national data whose design is sound — enough history, an observable demand proxy, distinct flighting — but which carries an affiliate retainer billed at a flat weekly rate and a retail-media line that launched in the third year. Both fit; neither can be optimised, and the tool says so rather than returning a budget recommendation built on the prior.
156 × 1 · 6 channels
answer key
meridian_format
The geo dataset re-emitted under Google Meridian's column naming (time / Channel0_spend / Channel0_impression / GQV / Promo). Format-compatibility fixture for the column mapper.
156 × 25 · 6 channels
answer key