In terms of future research that may be done on this agenda, additional variables that were not used in this framework, or are hard to quantify in a sense, have to be held accountable for. Variables such as the effects of league position, the culture of a club, fixtures played home or away, the number of derby games and crowd attendance could all potentially have a significant effect on sanction outcomes. Factors like this would allow for the club, referee and game effects to be controlled which would provide us with more accurate and perhaps more insightful findings into disciplinary outcomes and whether or not these would have a significant effect on the racial bias as well, remains to be seen.