... STRAIGHT TOTHENBA, WHERE HE EARNED ABOUT $10 MILLION OVER FOUR YEARS.IN THIS CHAPTERYOU WILL . . . Learn the differencebetween positive andnormative statements Learn two simplemodels—the circularflow ... way of thinking. Mathe-maticians talk about axioms, integrals, and vector spaces. Psychologists talk about ego, id, and cognitive dissonance. Lawyers talk about venue, torts, and promissoryestoppel.Economics ... Economists may disagree about the validity of alternative positive theories about how the world works.◆ Economists may have different values and, therefore, different normativeviews about what policy...