Christina Romer, the University of California at Berkeley economics professor and President Obama's first chief economist, once relayed the old joke that "there are two kinds of students: those who hate economics and those who really hate economics." She doesn't believe that, but it's true. I'm surprised how many students tell me economics is their least favorite subject. Why? Because too often economic theories defy common sense. Alas, the policies of this administration haven't boosted the profession's reputation.

Consider...