"When you can measure what you are speaking about, and express it in numbers, you
know something about it; but when you cannot express it in numbers, your knowledge
is of a meagre and unsatisfactory kind; it may be the beginning of knowledge, but you
have scarcely, in your thoughts, advanced to the stage of science, whatever the matter may be." Lord Kelvin
Anatomy of grand corruption: a composite corruption risk index based on objective data