The cost-output elasticity can be written and calculated as

Cigarettes served as money in some POW camps during World War II. Given this fact, we would expect to observe

A) no one ever smoking a cigarette. B) people usually resorting to barter rather than using cigarettes as money. C) prices of other goods expressed in terms of cigarettes. D) only government-issued cigarettes being accepted as money.

For which of the following products is social influence likely to have the greatest impact?

A) school textbook B) restaurants C) high-blood pressure medication D) toothpaste