Regime Switches in GDP Growth and Volatility: Some International Evidence and Implications for Modelling Business Cycles
AbstractThis paper has three main objectives. First, we re-examine some recent findings that suggest a structural decline in the variance of GDP growth in the United States. We estimate a univariate model in which both the mean growth rate of GDP and its variance are influenced by latent state variables that follow independent Markov chain processes. We are particularly interested in evidence of increased stability in the U.S. economy, either because of reduced volatility or a narrower gap between growth rates in expansions and recessions. Second, we investigate whether a similar phenomenon has occured in other countries. Finally, we explore the extent to which this more general model is better able to describe the shape of actual business cycles. We find evidence of a reduction in GDP volatility in U.S. data, beginning in late 1984. However, it is less clear that this change represents a structural break. The recent U.S. recession has reduced the probability of being in the low-variance state. Using data from Australia, Canada, Germany, Japan and the United Kingdom, we find evidence of a similar reduction in volatility of GDP growth. The shift for Japan apparently happened in about 1974, and the past decade's poor economic performance seems to have brought a return to the high-variance state. Apart from Germany, the variance reductions in the other countries all occurred within a ten year period between the early 1980's and the early 1990's. Finally, when we test for non-linear effects using Bayes factors, we find that allowing for a switching variance is much more important than a switching mean. Although the hypothesis of homoscedasticity is overwhelmingly rejected, there is little evidence that this model is better able to capture the shape of actual business cycles.
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Bibliographic InfoPaper provided by Melbourne Institute of Applied Economic and Social Research, The University of Melbourne in its series Melbourne Institute Working Paper Series with number wp2002n21.
Length: 38 pages
Date of creation: Nov 2002
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Other versions of this item:
- Smith Penelope & Summers Peter M, 2009. "Regime Switches in GDP Growth and Volatility: Some International Evidence and Implications for Modeling Business Cycles," The B.E. Journal of Macroeconomics, De Gruyter, vol. 9(1), pages 1-19, September.
- E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles
- E37 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Forecasting and Simulation: Models and Applications
- C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models
This paper has been announced in the following NEP Reports:
- NEP-ALL-2002-11-18 (All new papers)
- NEP-ETS-2002-11-18 (Econometric Time Series)
- NEP-RMG-2002-11-18 (Risk Management)
- NEP-TID-2002-11-18 (Technology & Industrial Dynamics)
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