The amount of output produced by an average worker in ________ is labor productivity.

When total utility is at a maximum, marginal utility is zero.

a. true b. false

List prices on new cars do NOT change very often, so

A) the real price of cars is very inflexible. B) the prices of new cars can only be flexible if there are changes in the cost of materials. C) price flexibility is not an important feature in the auto market. D) price flexibility shows up primarily through the negotiations between buyers and sellers.