Another form of potential referee bias was conducted in the study done by Reilly and Witt (2013). Tests for home biases were undertaken using player/match level data, with the measured bias coming in the form of the strictest sanction, the red card. Although evidence was found for home biases in the Premier League, this did not occur through this form of disciplinary actions, but rather smaller factors that would not have a major effect on the game e.g. fouls given.  Further studies took place by Reilly and Witt in 2016, with the use of both random effect and player-specific models and a non-panel pooled logit model, to test for potential biases in the number of bookings given to the away team. Credit to refereeing training and the employees themselves, as next to no evidence was found to suggest referees were succumbing to pressure from external factors (Reilly & Witt, 2016).  As the measure of social pressure in this experiment was the fans in attendance, especially in the Premier League, the fact that referees are not swayed to make decisions that would have a major effect on the game to favour the home team, should be recognised and praised.