How can the money supply impact interest rates and investment?

Which of the following statements is true about a consumer's optimal decision when indifference curves are concave?

A) Both goods are consumed. B) No goods are consumed. C) Only one of the goods is consumed. D) It occurs at the point of tangency with the budget line.

The cost of not being able to extract and sell a nonrenewable resource in the future (because it is being extracted in the present) is known by natural resource economists as the:

A. extraction cost. B. future cost. C. conservation cost. D. user cost.