Q. In the Cagan model, if the money supply is expected to grow at some constant rate m (so
that Emt+ s = mt + sm), then Equation A9 can be elucidate how to imply that pt = mt + gm.
a. Interpret this result.
b. Illustrate what happens to the price level pt when the money supply mt changes, holding the money growth rate m constant?
c. Illustrate what happens to the price level pt when the money growth rate m changes, holding the
current money supply mt constant?
d. If a central bank is about to reduce the rate of money growth m but wants to hold the price level pt constant, Illustrate what should it do with mt? Can you see any practical problems that might arise in following such a strategy?
e. Elucidate how do your previous answers change in the special case where money demand does not depend on the expected rate of inflation (so that g = 0)?