I agree with post #1- I’ve not seen a compiled list of actual ED matriculations compared to acceptances, but I have sometimes looked at it based on an individual school’s published enrollment history.
I think there should be a new term used rather than “yield” for this percentage. Something along the lines of “renege rate” “default percent” “backtracks” or “dishonor”, and then I would be interested to know if certain schools have higher than expected numbers.