Monetary Economics Marija Vukotic

Monetary Economics Marija Vukotic6

Assignment 2
1. Consider a standard baseline New Keynesian model described in \New Perspectives
on Monetary Policy, In ation, and the Business Cycle”, by Jordi Gal.
(a) Explain the dierence between a traditional backward-looking Phillips curve and
the New Keynesian Phillips curve? Write down the expression for the NKPC and
provide some intuition behind it. What are the main criticisims of the NKPC?
(20 marks)
(b) In this model, the nominal interest rate (notice that in this paper it is denoted
by rt and not it as in the class notes) can be written in the following way:
rt ??  =

 ?? 1
1 + 
! 1X
k=1


1 + 
!k??1
Et f
yt+kg +
m
1 +  (1 ?? m)

mt
Derive this expression (equation (27) in Gali’s paper, notice that it should have
?? on the LHS). (30 marks)
(c) To the extent that money growth is positively serially correlated (assume m =
0:5), the nominal rate will necessarily increase in response to a monetary ex-
pansion. Under what conditions the liquidity eect, which would imply negative
relationship between nominal interest rate and quantity of money in the economy,
can be restored? (20 marks)
(d) Using Dynare, replicate Figures 3 and 5 from Gali’s paper. Explain the results
and submit a copy of your dynare .mod le. (30 marks)
1

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