Why Do Retirees Buy Such Big Houses?

…and Other Riddles From The Economic Naturalist: “The Cornell economics professor Robert Frank begins a semester by asking his students to ask and answer a real-world economics question in 500 words or less. He has now compiled these essays in a book called The Economic Naturalist. It is a great deal of fun, and interesting. Below are some excerpts, including the illustrations by Mick Stevens…”

(Freakonomics via walker)