Quoted: In the end, whatever happens in San Francisco and New York tends to diffuse across the country, but as least some regulations could end up being to Airbnb’s advantage, said Hart Posen, a professor in the business school at the University of Wisconsin.“You need a certain degree of scale to manage that kind of regulations, and that’s a barrier to new companies coming into the field. Once [Airbnb] builds the software to do it, it’s usable in San Francisco and Chicago and everywhere else” he said.