Which of the following products may have a free-rider problem?

Which of the following is the best measure of the total amount that the federal government owes to private owners of U.S. Treasury securities?

A) the government budget deficit B) the gross public debt C) government interagency borrowing D) the net public debt

In the classical model the interest rate is determined by

a. real investment demand. b. real saving. c. government spending. d. tax revenues. e. all of the above.