Which of the following is a macroeconomic concern?

Three-wheel cars made in North Edsel are sold for 5000 pounds. Four-wheel cars made in South Edsel are sold for 10,000 marks. The nominal exchange rate between the two countries is three marks per pound

The real exchange rate between the two countries is A) 0.50 three-wheel cars per four-wheel car. B) 0.66 three-wheel cars per four-wheel car. C) 1.50 three-wheel cars per four-wheel car. D) 2.00 three-wheel cars per four-wheel car.

Which of the following statements about private and social costs is TRUE?

A) Social costs include externalities. B) Private cost do not include externalities. C) Social costs are never smaller than private costs. D) All of the above.