ANZEIGE
A study, published in 2016, found that multiple classes on an aircraft increased the likelihood of misbehavior. The study, “Physical and Situational Inequality on Airplanes Predicts Air Rage,” by Katherine A. DeCelles, now at the University of Toronto, and Michael I. Norton, at Harvard Business School, was published in the Proceedings of the National Academies of Sciences.
https://www.nytimes.com/2019/05/27/...ap6w22mJ6Ch6HTcsFQFW-PZn2HU8HFo4NU4mU7EQ-0zwQ