I think it is a consequence of globalization. I don't have any statistics to prove it, but I think that people in general are not very keen to dig very deep, th

I think it is a consequence of globalization. I don't have any statistics to prove it, but I think that people in general are not very keen to dig very deep, therefore everybody knows about certain number of "cool" cities, which everybody travels to and tries to move. So, all popular big cities experience this influx of people moving there; expats have more and more options nowadays, so they also move to only cool places, therefore, it creates this problem. Not only it raises rents, expats can bump them a lot! They earn a lot of money, so for them extra $100 is not a big problem. And urbanism – I guess more and more people move to cities nowadays, so it brings even more people who want to live there. Nobody really wants to live in the outskirts (unless it is USA), so major hubs, subway stations, downtown gets huge demand.