Research by Simon Kuper and Stefan Szymanski in Why England Lose -- And Other Curious Football Phenomena , show why there such an importance in keeping your best players .
Wages dictate 92 % of success .
Research by Simon Kuper and Stefan Szymanski in Why England Lose -- And Other Curious Football Phenomena , show why there such an importance in keeping your best players because wages dictate 92 % of success .