Wenger was an over achiever, especially during the first ten years of his career

Thomas Peeters, assistant professor at Erasmus School of Economics

On Friday 20 April, Arsene Wenger announced that he will step down as Arsenal manager at the end of the season, after 22 years on the job.  Since his appointment in October 1996, the Frenchman has overseen the club's transformation into a Premier League superpower, led them into a new stadium and installed a footballing philosophy which has been envied by clubs worldwide. He has won the Premier League three times and the FA Cup seven times and is looking to add an 11th major trophy in the Europa League.

Wenger was flooded with money from clubs like Manchester City, Chelsea and Manchester United. However, the conclusion remains that he is an over achiever, especially during the first ten years of his career, but also later he remained exceptional. This is the conclusion drawn by Thomas Peeters, Assistant Professor and sports economist at Erasmus School of Economics.

Peeters calculated the quality of coaches with a mathematical model, explaining the goal difference of the match on the basis of the difference in the players' wages of the two clubs, the difference in stadium value between the clubs, the home advantage, a club factor and a coach factor. That coach factor is the standard for quality. It is therefore the coach's contribution to the goal balance after checking for wages, stadium value, home advantage and the productivity of the club.