where CARDS is the total number of cards received (yellow and red), FOULS are the number of fouls committed by a player and GAMES are the total amount of games a player has appeared in, in a given season i which is also present for all other variables. There are a few variables that have not been taken into account due to the inability to quantify them in a regression, although they might have a minor effect on the number of cards a player receives e.g. club culture, nature of the player. These are incorporated into the error term, i. The variables SKINTONE and POSITION represent ordinal and nominal data respectively and are each represented by their own dummy variables as seen in Table 1. Likewise, VETERAN is a dummy variable equal to 1 if the player is over 33 years old, and 0 if otherwise, which again can be seen in Table 1.