Many textbooks are now available in two versions, a high-priced "domestic" version and a low-priced "international" version. Each version generally contains exactly the same text, but slightly altered homework problems.
a. Why would a textbook publisher go to the trouble to produce two versions of the same text?
b. Discuss whether the publisher's strategy would be more effective if it made the alterations secret, or if it announced them boldly.
c. The production of international versions of textbooks was concurrent with the explosion of the Internet. Explain why this is likely to be more than just a coincidence.