The New Zealand Business Cycle: Return To Golden Days?
The current economic expansion is one of the more enduring in New Zealand's post-war period. But is this a change from past behaviour? We examine New Zealand's post-war business cycles for the sample period 1946q1 to 2005q4, using a newly developed 60-year quarterly time series for real GDP. The non-parametric Bry and Boschan (1971) algorithm is used to derive Classical business cycle turning points, and to underpin the establishment of key cycle characteristics. The latter include cycle asymmetries, volatility, diversity and degree of duration dependence. Markov-switching models estimated by Gibbs-sampling methods (Kim and Nelson, 1999), are then used to derive mean growth rate and volatility regimes, and to draw implications. Results point to a return to a more rhythmic pattern of long expansions and short contractions, after that pattern was interrupted following the oil shocks of the 1970s and New Zealand's reforms of the mid to late 1980s and early 1990s. More rhythmic patterns should not be mistaken for a predetermined pattern, as duration test results show that cycle expansion paths do not age. This, together with the onservation that rates of growth are not dissimilar across the more sustained expansion phases, implies that in order to enhance New Zealand's prospoerity, policies are required that extend business cycle expansions without allowing the excesses that undermine those expansions to build up.
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