If the production possibilities curves of two countries have the same slope,
a. neither has a comparative advantage, and there are no gains from trade.
b. although there is no comparative advantage, there are potential gains if there are
differences in absolute advantage.
c. neither has an absolute advantage, and there cannot be gains from trade.
d. both have an absolute advantage, and can gain from trade.
If there are strong economies of scale and scope, then society
a. will not be able to prevent overt collusion.
b. will benefit from establishing a cartel.
c. cannot benefit from regulation of a natural monopoly.
d. will not be able to preserve free competition.
Which of the following will lead to a movement along the same demand curve?
a. Changes in income.
b. Changes in the price of substitute goods.