<p>Dan Fischel is/was a first-rate law-and-economics academic who joined then-colleague Richard Posner in forming a consulting firm, Lexecon, in the late 70s. It made them both (and a lot of other Chicago professors) quite rich, even though Posner was only involved for a few years before he became a judge. It still exists today, as Compass Lexecon, and is one of the top companies for providing economic experts for legal cases in the world.</p>