The main feature of this text on the theory of price is its numerous examples and its approximately 1000 worked problems. While showing the student the form of economics, the examples and problems stress throughout the way an economist uses form to think about substance.The revisions in the second edition make the approach still more accessible to students. Though it is essentially the same book, the prose has been simplified. Exercises of a straightforward sort have been added and the problems simplified. There are more step-by-step numerical problems, and each section now begins with a piece on what to read for (questions of a general nature that the section answers). Like clean air, space is scarce, so these additions required some cuts, but the basic emphasis on problem solving remains