How soccer industry database Transfermarkt arrives at its highly influential player valuations, even as its data is crowdsourced from volunteers and staff (Rory Smith/New York Times)

Rory Smith / New York Times:
How soccer industry database Transfermarkt arrives at its highly influential player valuations, even as its data is crowdsourced from volunteers and staff  —  Soccer takes the player valuations posted on the website Transfermarkt extremely seriously.  It has never really stopped to ask where they come from.