As it turned out, it's all about the division of aircraft into classes. Experts from the University of Toronto and Harvard business school have proved that in the aircraft with first class on-Board flash of anger occur four times more often. A similar effect also has a flight delay of 9 hours or more. This tells the newspaper The Hindustan Times.
Here's the thing. Usually to get to economy class, people have to Wade through first class. This fact emphasizes the element of social inequality. Scientists believe that such a separation affects the psychological climate in the plane.
Experts recommend that airline as little as possible to focus on the difference in comfort between classes. In the end, the ultimate goal of flight is to move but the other side of the world in a short period of time.