transferdata's Introduction

transfers

Data on European football clubs' player transfers, through 1992/93 to 2021/22 seasons (as found on Transfermarkt).

IMPORTANT: As of July 2022, transfer fees are now in EUR (taken from the .com Transfermarkt site), not GBP (taken from the .co.uk Transfermarkt site) due to a distortion of older fees being converted with a recent exchange rate.

Data

Transfers can be found in the data/ directory, in .csv format. There's a file for each of these leagues:

English Premier League (premier-league.csv)
English Championship (championship.csv)
French Ligue 1 (ligue-1.csv)
German 1.Bundesliga (1-bundesliga.csv)
Italian Serie A (serie-a.csv)
Spanish La Liga (primera-division.csv)
Portugese Liga NOS (liga-nos.csv)
Dutch Eredivisie (eredivisie.csv)
Russian Premier Liga (premier-liga.csv)

Common variables:

Header	Description	Data Type
`club_name`	name of club	text
`player_name`	name of player	text
`position`	position of player	text
`club_involved_name`	name of secondary club involved in transfer	text
`fee`	raw transfer fee information	text
`transfer_movement`	transfer into club or out of club?	text
`transfer_period`	transfer window (summer or winter)	text
`fee_cleaned`	numeric transformation of `fee`, in EUR millions	numeric
`league_name`	name of league `club_name` belongs to	text
`year`	year of transfer	text
`season`	season of transfer (interpolated from `year`)	text

Code

R/scrape-summer.R: retrieves latest summer window's data and appends new observations to CSVs in data/
R/scrape-winter.R: retrieves latest winter window's data and appends new observations to CSVs in data/
R/scrape-history.R: retrieves transfer history by league and exports to CSVs in data/
R/functions.R: local R functions used elsewhere