quote [ Airbnb expanded the availability of beds for visitors, gave young tourists a more authentic taste of their urban destination, and kept prices down for all travelers.

But Airbnb's success also encouraged dubious behavior on the part of “commercial” power users—property owners who listed downtown units (especially second residences) all year long, as if they were hotel rooms. Why would would that be a problem? Open apartments occupied for much of the year by Airbnb-using travelers reduce the number of available homes to people who want to move into that building. ]