“…In a considerable set of studies it turns out that the probability of sport success is positively associated with teams' talent availability. In particular, since the seminal contributions of El Hodiri and Quirk (1971) and Scully (1974) the winning ratio between two teams has always been associated with the relative available talent, whose better proxy is considered, with few exemptions Nüesch (2010, 2011)], the payroll. Along these lines, Fort and Quirk (1995), Vrooman (1995), Késenne (2000), Szymanski and Késenne (2004), Smith (1997), Hall et al (2002), Burger and Walters (2003), Frick (2007), Berri and Schmidt (2010), Rodríguez et al (2013), Frick (2013) and Szymanski (2013), among the others, have employed the talent ratio to compare the competitive balance equilibria inside professional team sports leagues.…”