Utility Functions Utility is an ordinal (i.e. ordering) concep[序数效用] E.g. if U(x)=6 and U(y)=2 then bundle x is strictly preferred to bundle y. But x is not preferred three times as much as is y Utility is always non-minusUtility Functions Utility is an ordinal (i.e. ordering) concept. [序数效用] E.g. if U(x) = 6 and U(y) = 2 then bundle x is strictly preferred to bundle y. But x is not preferred three times as much as is y. Utility is always non-minus