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The CIES Football Observatory 2017/18 season


Football offers incredibly interesting possibilities to when it comes to data-driven analysis. This e-book regroups the Monthly Reports published by the CIES Football Observatory over the course of the 2017/18 season. Two research notes are also included. The contents mainly relate to our three key areas of expertise: the demography study of the players’ labour market, the analysis of the technical performance of both teams and players, as well as the economic study of the transfer market.

Monthly Report 36

Demographic analysis of five major women’s football leagues

The 36th CIES Football Observatory Monthly Report analyses the composition of squads in five major women’s leagues: four European (Germany, Sweden, France and England), as well as the Women’s National Soccer League in the United States. The study notably highlights the increases in the average age of players. The number of expatriate footballers goes also up both on the pitch and in squads.

Monthly Report 35

World football expatriates: global study 2018

The 35th edition of the CIES Football Observatory Monthly Report analyses the presence of expatriate players in the world. The sample is composed of 12,425 expatriate footballers present on the 1st of May 2018 in 2,235 teams from 142 leagues of 93 national associations. Brazil is the most represented country (1,236 expatriates), followed by France (821) and Argentina (760). The nationals from these three associations make up 22.7% of the total number of expatriates.

Monthly Report 34

The importance of squad stability: evidence from European football


The first CIES Football Observatory Monthly Report published in January 2015 studied club stability across Europe. Three years later, the thirty-fourth edition develops this issue by illustrating the value of long-term planning for football clubs. The indicator selected is the percentage of players recruited by their employer club since less than one year.

Monthly Report 33

A comparative analysis of club-trained players in Europe

The analysis of the presence of club-trained players in squads across Europe is particularly interesting when it comes to comparing football cultures and strategies on an international level. The report covers first team squad members of clubs from 31 top division European leagues. It relies on the annual census carried out by the CIES Football Observatory on the 1st of October of every year since 2009.

Monthly Report 32

Is there an optimum squad age to win in football?

The demographic analysis of squads is a key research area of the CIES Football Observatory. The 32nd edition of the Monthly Report analyses the age structure of teams in 31 top division European leagues. This allows us to show discrepancies on an international level, while also investigating the links between the age structure of teams and success.

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