Because of the positive externality of vaccinations, economic efficiency would be improved
A) if more people were vaccinated. B) only if no people were vaccinated.
C) only if all people were vaccinated. D) if fewer people were vaccinated.
Question 2
Refer to Table 2-11. If the two countries specialize and trade, who should export digital cameras?
A) South Korea
B) China
C) There is no basis for trade between the two countries.
D) They should both be importing digital cameras.
