As noted in this thread, the claim is not without *some* basis in fact, but - as is often the case with these kinds of social science factoids - both the scale & certainty of the effect are based on research that supports neither. https://twitter.com/RottenInDenmark/status/1172519465138835456 …
I'm old enough to remember when the left insisted that *courts* should take as gospel the same social science factoids in the form of a Brandeis Brief.