Yeah, that's quite a strong assumption. Basically, they're assuming that the local drug use is similar to the national one. While not perfect, they provide some

Yeah, that's quite a strong assumption. Basically, they're assuming that the local drug use is similar to the national one. While not perfect, they provide some other cases in which these data were deemed more trustworthy than police reports. at least to me it is quite crystalline that a system relying on past police data to predict future crime will be inherently biased by the fact that the police data itself is biased towards certain demographics