Suppose a competitive market is comprised of firms that face identical cost curves. The firms experience an increase in demand that results in positive profits for the firms. Which of the following events are then most likely to occur? (i) New firms will enter the market. (ii) In the short run, price will rise; in the long run, price will rise further. (iii) In the long run, all firms will be

Frictional unemployment is often thought to explain relatively long spells of unemployment

a. True b. False Indicate whether the statement is true or false

Which of the following factors make a barter system inefficient relative to a money system?

a. Unanticipated inflation in the money system b. Gains from trade for buyers in barter transactions come at the expense of an equivalent loss from trade for sellers. c. Complete dependence on double coincidence of wants in a barter system. d. People in close-knit communities cannot trust the quality of the barter goods being exchanged.