To get a handle on Airbnb, major European cities are appealing to a higher power.
Ten city governments published an open letter last week asking the European Union for help in what they see as a dangerous turn of events. At issue is a statement from the European Court of Justice that says Airbnb is a digital platform rather than an accommodations provider. The cities—Amsterdam, Barcelona, Berlin, Bordeaux, Brussels, Krakow, Munich, Paris, Valencia and Vienna—fear such a ruling would remove a key tool they have to regulate against the worst effects of the vacation-rental industry.