a. Does this production possibilities curve show increasing opportunity costs? Explain.
b. What is the opportunity cost of moving from point I to point D? Explain.
c. What is the opportunity cost of moving from point C to point B?
d. Which of points A E is the most efficient? Explain.
Answers: a. Yes; the bowed-outward shape of the production possibilities curve indicates
from the perspective of society.
7. During wartime, countries shift production from civilian goods, like automobiles and clothing, to military
goods, like tanks and military uniforms. When the United States entered World War I in April 1917, for
example, the federal government created the War Industries Board and charged it with determining
production priorities and converting plants to meet war needs. In the following year, automobile
production fell 43 percent as output of military vehicles soared. When the war ended, 19 months later, in
November 1918, the government cancelled $2.5 billion in military contracts and the nation resumed
normal production. Assuming that in 1917 the United States was at point A on the production possibilities
curves shown, show what happened between April 1917 and November 1918. Show what happened
once the war ended.