Which of the following products should be sold face-to-face rather than by mass advertising?

If the elasticity of supply of a good is zero, then its

A) supply curve is vertical. B) supply curve is horizontal. C) demand curve must be vertical. D) supply curve is positively sloped.

One of the advantages of floating exchange rates is that:

a. consumers always know how much imported goods cost. b. businesses always know, in advance, what future exchange rates will be. c. countries are free to pursue their own macroeconomic policies without maintaining exchange rates. d. countries cannot act independently and must thus coordinate their macroeconomic policies. e. the global interest rate tends to decline to the lowest possible level.