Which of the following are included in interest income? i. payments made for the use of land ii. income paid to households for loans they make iii. payments made by households for their borrowing

The above figure shows the U.S. market for 1 carat diamonds. Suppose the United States imposes the import quota shown in the figure. With the import quota, how many diamonds can be imported?

A) 500,000 B) 700,000 C) 400,000 D) 900,000 E) 300,000

By 2020, automobile market analysts expect that the demand for electric autos will increase as buyers become more familiar with the technology

However, the costs of producing electric autos may increase because of higher costs for inputs (e.g., rare earth elements), or they may decrease as the manufacturers learn better assembly methods (i.e., learning by doing). What is the expected impact of these changes on the equilibrium price and quantity for electric autos? A) Unambiguously higher equilibrium price and quantity B) Unambiguously higher price, and equilibrium quantity may be higher or lower C) Unambiguously higher quantity, and equilibrium price may be higher or lower D) We cannot form any unambiguous expectations for either price or quantity