Business cycle asymmetry and duration dependence: an international perspective

The business cycle behaviour of macroeconomic variables has long been of interest to economists, and attention has recently focused on two aspects of this behaviour - the ʹstylized factsʹ of cyclical asymmetry and duration dependence. Cyclical asymmetry is where the economy behaves differently over the expansion and recession phases of the business cycle. Duration dependence, on the other hand, concerns the question of whether, for example, the probability of a cyclical expansion is dependent on how long the expansion has been running, or whether business cycle lengths tend to cluster around a particular duration. Using an international data set containing annual output per capita for 22 countries, we focus attention on non-parametric techniques for extracting cyclical components and for modelling and testing asymmetry and duration dependence. Once outliers, primarily associated with wars, are omitted, there is little international evidence of asymmetry. There is considerably more evidence of duration dependence, which is detected in the majority of countries using a variety of nonparametric tests. There is thus widespread evidence against the constant hazard hypothesis that cyclical patterns occur simply by chance. Business cycle durations do appear to cluster around certain values, with the average duration being about 3.6 years.