According to John Maynard Keynes, an economist must possess a rare combination of skills including being a mathematician, historian, statesman, and philosopher

The market interest rate

a. represents the opportunity cost of investing with borrowed funds b. has no impact on the firm's investment decision if the firm uses borrowed funds c. represents the opportunity cost of investing with savings d. has no impact on the firm's investment decision if the firm uses savings e. represents the opportunity cost of investing with either borrowed funds or savings

Which of the following is necessary for the invisible hand of market prices to work properly?

a. buyers and sellers who generally tend to disregard their own self-interest b. democratic political procedures and highly regulated markets c. price controls that restrict the movement of market prices d. competition and property rights that are well-defined and enforced