Steven Kopits argues about the relevance of market imperfections, to wit:
What the hell do you teach your students, Menzie? “Well, you know, here’s the theory, but let’s not get carried away with it in real life.”? Why would anyone want to be an economist when the bulk of your views seem to revolve around exceptions to the rule, about presumptions that you are smarter than the market or that markets don’t work?