I suppose I should qualify that by adding “short form category” to the end, but really, this article at New Atlas is among the best I’ve ever seen from any popular magazine or website. It begins by explaining a finding reached over a decade ago by one researcher each from UMich and Georgia State University. Their conference paper took several years to make it into print in the academic journal, Political Behavior. For reasons that will become clear later, I’ve checked the Dartmouth website that houses the original conference paper and the journal Political Behavior. They appear to be on the up-and-up.
Quoting from the first version, the authors Nyhan and Reifler state: