Did Rothbard “Borrow” the Income and Substitution Effects?
From the introductory undergraduate to the advanced PhD courses in microeconomics, most students are taught that the concept of an indifference curve is very useful in analyzing individual choice. I emphasize the term “useful” for a reason. No professor I have asked about the concept ever said it was literally true. I don’t think anyone who understands the concept would ever try to claim that this is how humans actually make choices. Rather, we have been instructed to treat the microeconomic models only as tools for prediction of phenomena.
