Walter Williams is just not a Nobel-level guy. He wrote a good book, "The State Against Blacks." If you listen to him on Rush, he's really a Johnny-one note. Sowell probably should be a winner, but he has done virtually no quantitative work, and the judges seem to like that stuff.
"When you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meager and unsatisfactory kind: it may be the beginning of knowledge, but you have scarcely, in your thoughts, advanced to the stage of science." Lord Kelvin, Popular Lectures and Addresses (1891-1894)
Joe writes: "True, true , true. Let's see - was he the guy who said heavier than air vehicles would never fly?"