Frayed Knot wrote: That's why hoops, with its high volume of ref decisions, almost all of them subjective, and soccer, where the out-sized importance of a call/non-call often has game altering impact, showed the biggest HFA and one that was consistent in leagues throughout the world in those sports. I can't remember now if it was the same author or others but there was some fascinating data from soccer games played sans fans in the earlier parts of the pandemic, basically revealing that without the fans there, the visiting team got a lot more calls.