5) Assume that the farmer and the rancher can switch between producing pork and
producing tomatoes at a constant rate.
Without trade, the farmer produced and consumed 2 pounds of pork and 4 pounds of
tomatoes and the rancher produced and consumed 4 pounds of pork and 2 pounds of
tomatoes. Then, each person agreed to specialize in the production of the good in which
he has a comparative advantage and trade 4 pounds of pork for 6 pounds of tomatoes.
As a result,
a.the farmer gained 3 hours worth of production and the rancher gained 4 hours worth
of production.
b.the farmer gained 4 hours worth of production and the rancher gained 6 hours worth
of production.
c.the farmer gained 6 hours worth of production and the rancher gained 8 hours worth
of production.
d.the farmer gained 8 hours worth of production and the rancher gained 10 hours worth
of production.
6) In the long run a company that produces and sells covers for cell phones incurs total
costs of $2,500 when output is 1,250 covers and $4,000 when output is 1,500 covers.
For this range of output, the cell phone cover company exhibits
a.economies of scale.
b.constant returns to scale.
c.diseconomies of scale.
d.efficient scale.
7) Assume for the United States that the opportunity cost of each airplane is 50 cars.
Which of these pairs of points could be on the United States’ production possibilities
frontier?
a.(200 airplanes, 5,000 cars) and (150 airplanes, 4,000 cars)
b.(200 airplanes, 12,500 cars) and (150 airplanes, 15,000 cars)
c.(300 airplanes, 15,000 cars) and (200 airplanes, 25,000 cars)
d.(300 airplanes, 25,000 cars) and (200 airplanes, 40,000 cars)