“…For example, if the object of analysis is the effect of performance on the pitch on attendance, it will be more useful to employ variables such as the 'percentage of victories' (Dawson et al, 2000;Marques, 2002;Boulier and Stekler, 4 2003), 'number of goals scored by match' (Palacios-Huerta, 2002), 'team's goal average weighted by relative quality of rival team' (Koning et al 2001), 'score/goal difference' (Boulier and Stekler, 2003;Palacios-Huerta, 2002), and even variables which incorporate the 'playing style' (Cocco and Jones, 1997). Koning (2003) working on an evaluation of the effect of hiring coaches on team performance used 'average goal difference,' 'goals conceded,' and 'goals scored.…”