[dimitar]

Are you sure that an European equivalent of white-flight hasn't happened? People who are less likely to like living with immigrants are likely to move to suburbs or not move to the cities in the first place.

Enclaves are caused by "tipping" in a Schelling check-board model. It would be interesting to check the data to this type of model.

[simongray]

The only flight we see in Denmark are people fleeing the quiet rural areas and moving to the big university cities, primarily Copenhagen and to a lesser degree Århus.