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Unit roots, flexible trends, and the Prebisch-Singer hypothesis

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  • Winkelried, Diego
Abstract
This paper studies the dynamic properties of relative commodity prices, especially the Prebisch-Singer hypothesis on their secular decline, using a new family of unit root tests based on the Fourier approximation to the data's underlying trend. The approximation controls for low-frequency variations such as structural breaks or the long swings induced by hypothesized super cycles in the data. Regarding the extant literature, we find considerably more evidence against nonstationarity in relative commodity prices, and very limited support for the Prebisch-Singer hypothesis.

Suggested Citation

  • Winkelried, Diego, 2018. "Unit roots, flexible trends, and the Prebisch-Singer hypothesis," Journal of Development Economics, Elsevier, vol. 132(C), pages 1-17.
    • Handle: RePEc:eee:deveco:v:132:y:2018:i:c:p:1-17
    DOI: 10.1016/j.jdeveco.2017.11.005
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    Cited by:

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    2. Gil-Alana, Luis Alberiko & Poza, Carlos, 2024. "Volatility persistence in metal prices," Resources Policy, Elsevier, vol. 88(C).
    3. Jingjing Lyu & Bernd Süssmuth, 2024. "Global Linkages across Sectors and Frequency Bands: A Band Spectral Panel Regression Approach," CESifo Working Paper Series 10970, CESifo.
    4. Cunado, Juncal & Gil-Alana, Luis A. & Gupta, Rangan, 2019. "Persistence in trends and cycles of gold and silver prices: Evidence from historical data," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 514(C), pages 345-354.
    5. Addison, Tony & Ghoshray, Atanu, 2023. "Discerning trends in international metal prices in the presence of nonstationary volatility," Resource and Energy Economics, Elsevier, vol. 71(C).
    6. Awaworyi-Churchill, Sefa & Inekwe, John & Ivanovski, Kris & Smyth, Russell, 2022. "Breaks, trends and correlations in commodity prices in the very long-run," Energy Economics, Elsevier, vol. 108(C).
    7. Emanuele Russo & Neil Foster-McGregor, 2022. "Characterizing growth instability: new evidence on unit roots and structural breaks in countries’ long run trajectories," Journal of Evolutionary Economics, Springer, vol. 32(2), pages 713-756, April.

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    More about this item

    Keywords

    Primary commodity prices; Unit roots; Long swings; Super cycles;
    All these keywords.

    JEL classification:

    • C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes
    • O13 - Economic Development, Innovation, Technological Change, and Growth - - Economic Development - - - Agriculture; Natural Resources; Environment; Other Primary Products

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