People with last names at the end of the alphabet are more likely to be impulsive buyers according to a new study. The implication for crowds is that people are conditioned when they are young to be called in order. Those closer to the top are not as anxious. However, those with a last name starting with a u, v, w, x, y, or z are tired of waiting to be called. Thus, when they are older they replicate the behavior when doing other activities.
Here is the press release: https://www.jcr-admin.org/pressreleases/011711135142_Carlsonrelease.pdf