This paper examines the duration and magnitude of commodity-price cycles. It finds that for most commodities, price slumps last longer than price booms. How far prices fall in a slump is found to be slightly larger than how far they rebound in a subsequent boom. There is little evidence of a...

Using the longest dataset publicly available (The Economist's index of industrial commodity prices), we analyze the behavior of real commodity prices over the period 1862-99, and have two main findings. First, while there has been a downward trend in real commodity prices of 13 percent per year...

Consensus estimates put the half-life of deviations from purchasing power parity (PPP) at about four years (Rogoff, 1996). However, conventional least squares estimates of half-lives are biased downward. Accordingly, as a preferred measure of the persistence of real exchange rate shocks, this...

This paper examines the persistence of shocks to world commodity prices, using monthly IMF data on primary commodities between 1957-98. We find that shocks to commodity prices are typically long-lasting and the variability of the persistence of price shocks is quite wide. The paper also...

This paper documents the main stylized features of macroeconomic fluctuations for 12 developing countries. Cross-correlations between domestic industrial output and a large group of macroeconomic variables (including fiscal variables, wages, inflation, money, credit, trade, and exchange rates)...

Univariate studies of the hypothesis of unit roots in real exchange rates have yielded consensus point estimates of the half-life of deviations from purchasing power parity of between three to five years. However, least squares-based estimates of half-lives are biased downward. Accordingly, we...

We study the properties of a test that determines whether two time series comove. The test computes a simple nonparametric statistic for concordance, which describes the proportion of time that the cycles of two series spend in the same phase. We establish the size and power properties of this...