It's Maura yet again!  I've been thinking about Sean's and Raindrop's
questions.  Like I said, statistics are not my game.  But even if they
were... how would we compare the community impact of, say, a unit of
blood, a person learning a lifesaving skill like CPR, a person
sheltered in a disaster, a meal delivered to someone cleaning up after
a disaster, etc.?  And when it comes to efficiency, a meal served in a
shelter setting is obviously going to cost less than a meal delivered
on one of our trucks to a recovering neighborhood, so how do you
compare?  Some vital services are quick and easy to deliver; others
are hard and expensive, but equally vital.  Costs can also vary widely
from year to year.
And if you are comparing one charity with another... how do you
compare, say, the impact of taking a school kid to the symphony with
the impact of funding research, which perhaps fails, on some deadly
disease?  Our missions are all so different!