Topics on the Frontier of Dynamic, Stochastic General Equilibrium Models
By Lawrence J. Christiano
Lectures and Handouts
1) Introducing financial frictions into the New Keynesian DSGE Model.
a) Microfoundations for the Costly State Verification (CSV) approach.
b) Integrating CSV into an NK model and the results of Bayesian estimation of the model using US and EA data.
i) The model
ii) The importance of risk shocks.
iii) The response of monetary policy to an increase in interest rate spreads.
d) A moral hazard approach to financial frictions
ii) Using the model to think about unconventional monetary policy.
2) Implications of the zero lower bound on the nominal rate of interest.
a) The deflation spiral, the government spending multiplier.
b) Quantitative analysis of the role of the zero bound in the dynamics of US data, 2008 and 2009.
3) Ramsey-optimal monetary policy: theory and practice (Riksbank)
a) News and inflation targeting.
b) Using Ramsey optimal policy as a benchmark for evaluating a policy rule.
b) Lack of perfect insurance against unemployment and Lucas’ assessment of the cost of business cycles.
c) Using the information in unemployment data to estimate the output gap.
d) Alternative approaches based on search and matching.
Two Afternoon Sessions
Apart from giving students hands-on experience with the quantitative analysis of models, the two homework exercises allow us to discuss the following topics:
a) Bayesian estimation of DSGE models.
b) The HP filter as a way to estimate the output gap.
2) The Taylor principle (see section 3 of handbook chapter).
a) The rationale for the principle in the standard NK model.
b) Circumstances when things can go awry with the Taylor principle:
i) An important working capital channel.
ii) News shocks.
3) The timeless perspective in Ramsey-optimal monetary policy (see lecture 3 above).
The pdf file contained in the following zip file should be available in hard copy. The zip file itself should be placed in a directory labeled assignment8
The following text should be distributed as hard copy: http://faculty.wcas.northwestern.edu/~lchrist/course/assignment8.htm
The text for this assignment should be distributed in hard copy, and it is the pdf file in the following zip file:
The zip file should be placed in a folder labeled assignment#9
The main reference for the course is my chapter with Trabandt and Walentin, in the forthcoming Handbook of Monetary Economics, edited by Friedman and Woodford.
Christiano, Trabandt and Walentin, Involuntary Unemployment in a Business Cycle Model
Bernanke, Gertler and Gilchrist’s classic 1999 paper.
Christiano, Motto, Rostagno (2003): Using the BGG model to analyze the cause of the US Great Depression, and the reason it lasted so long.
Christiano, Motto, Rostagno (2009): Using the BGG model to understand the causes of economic fluctuations in the EA and the US.
Government spending and the zero bound:
Christiano, Eichenbaum and Rebelo (2009) When is the Government Spending Multiplier Large?