Expected Utility Approach: Also the Morningstar Rating uses an enhanced risk - adjusted return measure based on «expected utility theory,» which accounts for
all variations in a separate account's monthly performance, with more emphasis on downward variation.
But many researchers, including Keller and Ross, didn't think
variations in a single gene could
account for all the differences
in size, fertility, odor, and aggression that
separated the two ant groups.