Real-Time Model Uncertainty in the United States: The Fed from 1996 to 2003

57 Pages Posted: 20 Apr 2005

See all articles by Robert J. Tetlow

Robert J. Tetlow

Board of Governors of the Federal Reserve System

Brian Ironside

Federal Reserve Board - Division of Research and Statistics

Date Written: April 2006

Abstract

We study 30 vintages of FRB/US, the principal macro model used by the Federal Reserve Board staff for forecasting and policy analysis. To do this, we exploit archives of the model code, coefficients, baseline databases and stochastic shock sets stored after each FOMC meeting from the model's inception in July 1996 until November 2003. The period of study was one of important changes in the U.S. economy with a productivity boom, a stock market boom and bust, a recession, the Asia crisis, the Russian debt default, and an abrupt change in fiscal policy. We document the surprisingly large and consequential changes in model properties that occurred during this period and compute optimal Taylor-type rules for each vintage. We compare these optimal rules against plausible alternatives. Model uncertainty is shown to be a substantial problem; the efficacy of purportedly optimal policy rules should not be taken on faith.

Keywords: Monetary policy, uncertainty, macro-economic modeling, real-time analysis

JEL Classification: E37, E5, C5, C6

Suggested Citation

Tetlow, Robert J. and Ironside, Brian, Real-Time Model Uncertainty in the United States: The Fed from 1996 to 2003 (April 2006). FEDs Series Working Paper No. 2006-08, ECB Working Paper No. 610, Available at SSRN: https://ssrn.com/abstract=701423

Robert J. Tetlow (Contact Author)

Board of Governors of the Federal Reserve System ( email )

20th Street and Constitution Avenue NW
Washington, DC 20551
United States

Brian Ironside

Federal Reserve Board - Division of Research and Statistics ( email )

20th and C Streets, NW
Washington, DC 20551
United States

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