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241 pages, Paperback
First published January 1, 2006
I tell my students that their answers to the questions should be viewed as intelligent hypotheses suitable for further refinement and testing. They are not meant to be the final word. When Ben Bernanke and I described Bill Tjoa's example about drive-up ATM keypads with Braille dots in our introductory economics textbook, somebody sent me an angry email saying that the real reason for the dots is that the American with Disabilities Act requires them. He sent me a link to a web page documenting his claim. Sure enough, there is a requirement that all ATM keypads have Braille dots, even at drive-up locations. Having Braille dots on drive-up machines might even be useful on rare occasions, as when a blind person visits a drive-up machine in a taxi and does not want to reveal his PIN to the driver.
I wrote back to my correspondent that I tell my students their answers don't have to be correct.... And since the the dots cause no harm, and might actually be of use, regulators might well find it advantageous to require them, thereby enabling themselves to say, at year's end, that they had done something useful.
1. Are sodas ever refrigerated in a store?
2. Are rectangular milk containers ever single serving?
3. Are milk containers ever round?
4. When soda is sold in amounts greater than a single serving, what is the shape of the container?