FairValue

Checking model

Esc

  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
  • EnvironmentTerminalExplore, compare and track players; market, league and model views.
  • EnvironmentStoriesValuations, head-to-heads and research findings, told as stories.
  • TerminalPlayer ExplorerSearch, filter and sort the player export.
  • TerminalComparison StudioTwo to four players on one scale.
  • TerminalWatchlistsNamed collections, kept in this browser.
  • TerminalMarket LandscapeHow observed value is distributed, and where the model drifts.

↑ ↓ to move · Enter to open · Esc to closeLoading player index…

Josh

Campbell

AMScotland · Hibernian FC

№ 482802Emerging €912k +0.27

Player dossierPremiership

JoshCampbell

AMAttacking MidfieldMidfield

Club
Hibernian FC
League
Premiership
Nationality
Scotland
Age
26
Height
182 cm
Foot
Right
Valued
20 May 2026

Reading the valuation

The market values Campbell at €1.2M. Model A, which never saw Campbell during training, estimates €912k: the market value is 32% above that estimate.

That is a factor of ×1.32. Model A's typical held-out miss is ×1.50 either way, so this gap is within its usual error.

Without league and club, Model B estimates €2.9M, further from the market. Model B is usually further off (typical miss ×2.07): league and club explain much of how the market prices players.

A gap describes the model's arithmetic for this player's inputs, not what the player is worth.

▲ +0.27A €912k▼ −0.88B €2.9M
Pitch length is a log value scale fitted to this player's figures. ● observed · ◇ Model A · dashed ◇ Model B · each arc is a residual, log(observed) − log(estimate).
Apps
59
Minutes
2,647
Goals
5
Assists
5
Started
23/59
Min / app
45
Cards
12Y 0R

Club matches, two years to the valuation date

The Valuation Journey

What moves Model A

Asking the prediction API to explain Model A for Campbell…

SHAP describes the model's arithmetic for this player's inputs, not what causes market value. Model B can be explained only by the live service; Model A also has a published explanation for the research players.

Model A vs Model B against the observed €1.2M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €1.2MModel A €912k

Asking the prediction API…

Held-out estimates come from cross-validation, with this player outside the training data: the honest comparison. Served models were refitted on every player, this one included, so they sit closer to the market. Shaded band: Model A's typical miss (×1.50 either way).

Player traitspercentiles vs 1,687 midfielders

Josh Campbell's percentiles among midfielders: Goals per 90 77th, Assists per 90 77th, Minutes, two years 51st, Starts 11th, Minutes, last 365 days 22nd, European club minutes 71st77thGoals77thAssists51stMinutes11thStarts22ndRecent71stEurope

Dashed ring: the midfielder median (50th percentile)

Goals per 90

Club goals per 90 minutes played in the two years to the valuation date.

0.17 this player0.08 midfielder median77th percentile

0.00peer deciles · median line · this player ●0.93

No passing, progression or defensive actions exist in the dataset, so no trait claims to measure them.

Valuation history every Transfermarkt valuation on record

First valuation
€50k
Oct 2019
Peak
€1.2M
Jun 2025
Model target
€1.2M
May 2026
Valuations
13
1 club change
May 2026€1.2MHibernian FCValuation the model is trained to reproduce

May 2026: €1.2M, Hibernian FC. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2019-10-07€50kArbroath FC
2021-12-31€250kHibernian FC
2022-06-27€400kHibernian FC
2022-12-13€450kHibernian FC
2023-03-22€550kHibernian FC
2023-06-26€750kHibernian FC
2023-12-05€900kHibernian FC
2024-05-30€900kHibernian FC
2024-12-03€800kHibernian FC
2025-03-12€1MHibernian FC
2025-06-17€1.2MHibernian FC
2025-12-10€1MHibernian FC
2026-05-20€1.2MHibernian FC

Audit context group-level, not about this player

Audit group
UEFA
Population gap, Model A
+0.093 95% CI +0.063 to +0.124
This player, market vs held-out A
+0.275

The group comes from first-listed citizenship and is never a model input. Across the population, non-UEFA players' market values sit about 10% above Model A's held-out estimates, relative to UEFA players in the same leagues. One player's residual says nothing about that pattern (typical miss ×1.50), and none of it is evidence of discrimination: the target may itself be biased. Open the Fairness Audit

In context observed value among comparable players in this build

All players in the Terminal →

Premiership311 players · median €400k

Valued above 76% of the 311 Premiership players.

€20k€150k€1M€7.5M€1.2MSee them in the Explorer →

Midfielders, all leagues1,687 players · median €2M

Valued above 35% of the 1,687 midfielders.

€20k€200k€2M€20M€1.2MSee them in the Explorer →

Where Campbell appears

Watchlists and the comparison tray are kept in this browser only.

Near this valuation closest observed values: same league, then same position

Counts and ranks of observed Transfermarkt values only; model errors are never ranked here. Full player export: Every player in the modelling population (D-011).