Munich Personal RePEc Archive

The Interdependence between Commodity-Price and GDP Cycles: A Frequency-Domain Approach

Ojeda-Joya, Jair and Jaulin-Mendez, Oscar and Bustos-Pelaez, Juan (2015): The Interdependence between Commodity-Price and GDP Cycles: A Frequency-Domain Approach.

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We study the interdependence between aggregate commodity prices and world Gross Domestic Product (GDP) by performing two empirical exercises with long-run data that starts in the 19th Century. First, we compute long-term and medium-term cycles and measure their degree of synchronization for different leads and lags. Second, we perform causality tests on the frequency domain to understand better the nature of their interdependence. Our results show first, evidence of cycle synchronization only in the case of super cycles. Second, there is causality evidence from GDP to aggregate commodity prices mostly on long-run frequencies; therefore, commodity-price trends and super-cycles are demand driven. Third, there is some causality evidence between oil-prices and GDP on both causation directions. However, oil price fluctuations cause GDP on business-cycle frequencies only. Finally, in the case of metal prices, the evidence is unclear for both causality directions implying that they are not demand driven. Overall, our results show that the interdependence between commodity prices and GDP varies significantly across types of goods and fluctuation frequencies.

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