Heard in class and faithfully reported

"- the consultants would take the arithmetic average but that's because they don't know the difference between this one and the geometric one" - Finance professor

"- so which one should WE choose?" - student asking
"do you want a cynical answer? are you really ready for it? ok, do you want to be on the buyer or the seller's side?" - Finance professor
"- you see Morgan Stanley uses 7.25% and Goldman Sachs 3%. This means that one advises more sellers and one advises more buyers!"