Is Irony a Giffin Good?

A printed banner on the microeconomics text I received declares, “Instructor’s Edition. This is your personal copy for use in textbook evaluation. Sale or resale is prohibited and will contribute to higher student textbook costs.” Nice try, South-western Publishing, but microeconomics instructors tend to think that increases in supply lower the price of most goods. The warning on the back includes some copyright law arguments along with the dubious economic statements.