On a world scale, how populous is the U.S. economy?

There is some agreement between the beliefs of President George W. Bush in 2001 on the effectiveness of tax cuts with the beliefs of former President

a. Keynes. b. Clinton. c. Reagan. d. Carter.

Initially, the nominal rate of interest is 8 percent and inflation is 4 percent. The nominal interest rate then rises to 12 percent and the inflation rate to 8 percent. It follows that the real rate of interest has

a. fallen. b. remained the same. c. risen to 8 percent. d. risen to 10 percent.