According to your text, who among the following have a comparative advantage in providing information that reduce transaction costs?

The official settlements account of a country measures

A) the receipts from goods and services bought and sold and transfers to and from foreigners. B) borrowing and lending between the country's residents and foreigners. C) the net increase or decrease in the country's official reserves. D) net transfer payments between the country's citizens and foreigners.

A black market may occur when

A) the government imposes a price floor below the market clearing price. B) the government imposes a price ceiling below the market clearing price. C) the government imposes a price ceiling above the market clearing price. D) the government does not impose either a price ceiling or a price floor.