" Signals such as high grades—or a peacock’s tail or big bank building—don’t indicate interest; they are marks of desirability. That is, the gaudy tail doesn’t signal how much the peacock is interested in a particular peahen; it signals how much the hens should be attracted to that particular cock. "

― Alvin E. Roth , Who Gets What — and Why: The New Economics of Matchmaking and Market Design