GEM: A New International Macroeconomic Model
January 2004

Research at the IMF

MULTIMOD Mark III Econometric Model

Other Titles in the Occasional Paper Series



O C C A S I O N A L   P A P E R      
239
 
   
GEM:
A New International
Macroeconomic Model


Tamim Bayoumi
With assistance from Douglas Laxton, Hamid Faruqee, Benjamin Hunt, Philippe Karam, Jaewoo Lee, Alessandro Rebucci, and Ivan Tchakarov


©2004 International Monetary Fund
November 30, 2004

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Contents


Preface
I   Overview
II   Philosophy and Approach
Why a New Model?
Structure of GEM
Strengths and Weaknesses of GEM
III   How Has GEM Been Used?
Measuring the Benefits of Raising Euro Area Labor and Product Market Competition
Should Monetary Policy Rules Differ Between Industrial Countries and Emerging Market Countries?
The Impact of Higher Oil Prices
IV   Current Development Work
Fiscal Policy
International Asset Markets
V   The Road Ahead
References
Boxes
2.1   Estimating Parameter Values
3.1   GEM Simulations of the Benefits of Greater Euro Area Competition
3.2   Using GEM to Analyze Monetary Policy Rules
Tables
2.1   Stylized View of the Strengths and Weaknesses of Successive Generations of Macroeconomic Models
3.1   GEM Estimates of the Long-Run Effects of More Competition-Friendly Policies in the Euro Area
3.2   MULTIMOD: Impact of a Permanent $5 a Barrel Increase in Oil Prices After One Year
Figures
2.1   Stylized View of Model Development
2.2   Simple GEM Structure
2.3   More Complicated GEM Structure
2.4   Dynamic Responses to a One Percentage Point Hike in Interest Rates for One Year: GEM Compared with Large Forecasting Models
2.5   Dynamic Responses to a Hike in Interest Rates: GEM Compared with a VAR
3.1   Dynamic Effects of More Competition-Friendly Policies in the Euro Area (Anticipated and Perfectly Credible)
3.2   Taylor Trade-Off in Monetary Policy Analysis
3.3   GEM: Impact of a Permanent 20 Percent Oil Price Hike After One Year
3.4   GEM: Impact of a Permanent and Temporary 20 Percent Oil Price Hike After One Year
4.1   Structural Fiscal Balances in the Major Economic Regions
4.2   Sum of International Assets and Liabilities in Major Advanced Economies
4.3   Capital Constraints for Emerging Markets