Unlike most articles blindly debating the pros and cons of the sharing economy, Krueger claims many hosts are professionals who arbitrage by leasing or buying long-term apartments and filling them nightly as a distributed hotel. It seems the money earned hosting -- (cost_of_operation * nightly_rate * occupancy_rate) -- is greater than signing a one year lease.
I used to offer my home on weekends when I was out of town for travel. Eventually, a guest offered to pay for the full month for significantly higher than my mortgage payment (and I contemplated various ways to spend a month away)! Sadly, our co-op board discussed and decided paid nightly guests violate our policies, ending my short hosting stint.
I'm torn. I love Airbnb and have used both sides (host and guest), and I like the idea that some people can use a space more efficiently than others. I'm less worried about taking a rental unit off the market and more worried about the intangible and hard-to-quantify side effects (safety, insurance, tax enforcement, neighbors' rights, etc).