There are very few mentally ill people wandering the streets in Oslo, Norway. I have seen one guy with unkept dredlocks who seems to enjoy hanging around and chatting to passers by, but he almost certainly has a public-funded apartment and generous disability pension.

The difference is very striking compared with Boston (a city with similar climate to Oslo) where there are many obviously mentally ill people wandering around talking nonsense, begging for money, carrying their things in plastic bags, and sleeping on the ground.