Journal or Book Title
Proceedings of the National Academy of Sciences
DeCelles and Norton (1) conclude that physical inequality (the presence of a first-class cabin) on airplanes is associated with a greater number of air rage incidents in economy class, and that situational inequality (boarding from the front rather than the middle of the airplane) is associated with a greater number of air rage incidents in both economy class and first class. Their study has many flaws that invalidate their conclusions, but we focus on just one, their failure to recognize a statistical artifact in their analyses.
National Academy of Sciences
Crede, Marcus; Gelman, Andrew; and Nickerson, Carol, "Questionable association between front boarding and air rage" (2016). Psychology Publications. 49.