As I said it's just an analysis, i'm not going through games match by match, decision by decision. I suppose psychologically, seeing a referee in charge that you dont trust must effect the way a player performs, that is very evident whenever we get into a close match with Taylor in charge. So in theory a referee can impact a game just by his presence.
When studying for possible referee bias the signs are usually very subtle - if they were obvious the official would lose his job or never progress far enough to worry us. A big sign though is where one team's results seem to significantly outperform expectations and their bitterest rivals do the complete opposite. I do not have a clue where Pawson's allegiances really lay, but I can use the data to make a guess and then see if subsequent data backs that theory up. With Taylor there is no doubt, but if we trust his data, then Pawson has to also come under scrutiny as his numbers are statistically worse. I use data not my eyes.
For Pawson the data sample is quite small - those with Taylor and the now departed Clattenberg are bigger. It could just be a coincidence with Pawson but i'm immediately suspicious of any referee whose league table looks distorted towards Utd, when based on overall results the "neutral" table should look different. It's an anomaly and all anomalies deserve investigation for me as they are potential betting edges. Now, I dont bet on City games as my judgement is biased, but if this study was for a team I would bet on/against I wouldn't need his trends to continue for many more games to start getting involved.
You are right of course in that his data could just be natural variation but it is already outside of what I would term normal deviations which is why i'd be interested. It is possible that his league table could show bias to Utd because he had some of their cup games against lower league sides and the numbers may be skewed, but the differential to what i'd expect and what I see with most of the other experienced officials is very big, so i'm suspicious. Before betting i'd look into that to make sure my numbers are robust, but one thing I learned a long time ago is that data tells a better long term story than relying on my eyes and in the case of a City game my biased blue tinted emotions. On a similar tack I guess that's why clubs and other major sporting teams now have so many analysts involved looking for little gains.
I would definitely have Pawson on my "watch with suspicion" list though. As I have said before, when we win easily we dont notice the refereeing as much, but in the close games it's worth keeping an eye. Pawson's data sample is still small, but if we fail to win the next few tight games with him and Utd keep winning similar games him then my suspicions would get very dark and into Taylor territory. Maybe i'm a paranoid blue, but I have used this strategy very successfully to find value bets on other club games. It's amazing what you can find when you look hard enough!
As you can tell, i'm an exciting night out.......