After Airbnb hosts converted New York's available housing stock to unlicensed hotel rooms, rents soared

Airbnb hosts are supposed to be smallholders: people who rent out a spare room or let out their homes while they're out of town -- but in New York (and other cities), the system is dominated by professional landlords who have illegally converted huge swathes of the city's available housing stock into unlicensed, highly profitable hotel rooms. (more")