In most of the theoretical examples in this book, prices have been quoted in dollars or cents. Is this choice of currency crucial? Would most examples be the same if prices had been stated in pounds, euros, or yen? Or, would it have mattered if the dollars used were "1900 dollars" or "2000 dollars"? How would you change the endless hamburger-soft drink examples, say, to phrase them in some other currency? Would such changes result in any fundamental differences? Or, do most of the examples in this book seem to display the classical dichotomy between real and nominal magnitudes?