If marginal cost is less than marginal revenue, a firm should

The primary advantage of mutual funds is that they

a. always make a return that "beats the market." b. allow people with small amounts of money to diversify. c. provide customers with a medium of exchange. d. All of the above are correct.

A shortage of kidneys (for transplants) results from

A) the legal price being set below the equilibrium price. B) the legal price being set above the equilibrium price. C) a price floor being set in the kidney market at P = $0, assuming the equilibrium price is greater than $0. D) a price ceiling being set in the kidney market at P = $0, assuming the equilibrium price is greater than $0. E) a and d