GDP measures underestimate the value of output produced by an economy because they include services not transferred through markets

If the inputs to a production process are perfect complements, the firm can choose from a virtually infinite array of combinations of the two inputs to minimize the costs of producing a given level of output

Indicate whether the statement is true or false

Bonds cannot have yields below the effective lower bound because:

A. the banking technology does not exist to deal with negative yields. B. the U.S. treasury guarantees all bonds to have a positive yield. C. people can always hold cash. D. all of the answers given are correct.