The invention of machinery that can double the amount of gold extracted from raw ore
will likely lead mining companies to
a. raise the world price of gold to pay for the new machinery.
b. lower the world price of gold because any amount can now be produced more
cheaply.
c. raise the world price of gold because miners’ wages must double as their productivity
doubles.
d. lower the world price of gold only if new mining companies are not allowed to enter
the industry.
An increase in rent will ordinarily lead to
a. an increase in usage of land that was formerly idle.
b. a decrease in total land employed.
c. less-intensive usage of land.
d. a decrease in the income of landlords.
An indifference curve is a line showing
a. combinations of goods that can be produced if all resources are fully employed.