Here's one we maybe didn't need a scientific study for. Seems college football not only increases crime in the city that hosts a game, but increases it dramatically when the home team loses in an upset:
"The largest estimated effects are found when an upset occurs, defined as when an unranked team beat a ranked team or when a lower-ranked team beat a higher-ranked team."
So I guess we now have evidenciary confirmation of this highly sophisticated, counter intuitive formula:
alcohol + student fans + more alcohol + the home team losing + even more alcohol = frustrated expressions of violence