Define the comparison
Job labels describe scenarios, not fitted player types. The stress factor applies equally to selected rates; it is an assumption, not a league-conversion model.Output and cost
Dark: Kolo Muani · Green: references · Brown: your cost scenarioSelected alternatives
| Alternative | npxG / xA per90 | Minutes | Selected output | Annualized partial cost | Full-term partial cost | Budget check |
|---|
Inspect an alternative
Performance history
Test a cost assumption
For unknown Juventus terms, enter your own fee, gross wage and contract duration. This changes only the scenario, not the source evidence. For retention, use incremental future costs; do not recharge sunk acquisition fees.
Fee / signing costs (€m)
Annual fixed gross wage (€m)
How much should we trust it?
Retrospective temporal rate checks: 2,396 striker-season pairs, with ≥450 minutes in both seasons. This survivor-based rate test does not validate total contribution or prove a recruitment edge.
| Error (RMSE; lower is better) | Shared Marcel baseline | Last season | Prior positional mean |
|---|---|---|---|
| npxG/90 | 0.126 | 0.141 | 0.171 |
| xA/90 | 0.077 | 0.088 | 0.098 |
Expected minutes are uncertain
The empirical baseline uses prior playing time. It does not know a manager’s selection, future injuries or the precise Juventus role. Validation retains covered zero-minute outcomes, with return events reported separately. Missing history and uncovered outcomes are excluded explicitly, not changed to zero.
Multiplying separately estimated rates and minutes is an output proxy. Their dependence is not modeled; the displayed endpoints are stress scenarios, not a calibrated joint interval.
What is—and is not—comparable
Every numerical forecast targets a full 38-match Serie A opportunity. Performance rates still come from the player’s prior league context. There is no validated adjustment that guarantees those rates at Juventus. npxG and xA are separate components, not an overall striker grade or additive team goals.
Feeder observations retain FotMob definitions and do not enter the Understat projection. Historical recorded positions are not within-match role-minute allocations. Unknown acquisition prices remain unknown; Transfermarkt market values never substitute for fees.
Source timing and closed-window alternatives
Historical files were reconstructed from available snapshots; their original publication vintages are incomplete. This is not a forecast proven to have existed before the transfer decision. Current transfers and contracts require dated evidence because the bulk transfer snapshot is incomplete around deadline day.
Vlahović is a hypothetical renewal comparator. David and Openda are hypothetical retention-before-loan alternatives. The known loan arrangements and unresolved salary-sharing make “keep for free” an unsupported claim.
Reproduce and inspect the evidence
Full comparison CSV · Versioned comparison data · Build report · Deal evidence · Minutes evaluation · Coverage audit · Independent review · Input hashes
Descriptive baselines only. No validated recruitment edge, final grade or monetary Deal Alpha is claimed.