Is there a name for this stereotyping phenomenon?

Each country seems to have regions that are stereotyped as having certain traits. usually: being stupid, being tight fisted, marrying their cousins, having sex with animals, being sluty, and a few others.

I ask because I notice that in Spain, they say Catalan people are tight fisted and not generous, in the UK they say Scottish people are tight fisted and not generous. I also see the same thing with other countries.

Does this phenomenon of countries appointing certain areas certain “traits” have a name?

Bonus question, Do statistics ever match up with the so called trait?