Hate crime did spike after the referendum - even allowing for other factors

Did hate crime spike after the referendum? While there is no doubt the number of reported crimes increased, they are always more frequent in June and July and after other significant events, like terror attacks. After controlling for these factors, Daniel Devine (University of Southampton) finds the referendum was associated with a statistically significant rise in hate crime. But how much, and what was it about the vote that had such a powerful effect?