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Are Shocks to Commodity Prices Persistent?

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  • Paresh Kumar Narayan

    ()

  • Ruipeng Liu

Abstract

This paper considers the issue of whether shocks to ten commodity prices (gold, silver, platinum, copper, aluminum, iron ore, lead, nickel, tin, and zinc) are persistent or transitory. We use two recently developed unit root tests, namely the Narayan and Popp (NP, 2010) test and the Liu and Narayan (LN, 2010) test that allow for two structural breaks in the data series. Using the NP test, we are able to reject the unit root null for iron ore and tin, while, using the GARCH-based unit root test of LN, we are able to reject the unit root null for five commodity prices; namely, iron ore, nickel, zinc, lead, and tin. Our findings, thus, suggest that only shocks to gold, silver, platinum, aluminum, and copper are persistent.

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File URL: http://www.deakin.edu.au/buslaw/aef/workingpapers/papers/2010_02.pdf
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Bibliographic Info

Paper provided by Deakin University, Faculty of Business and Law, School of Accounting, Economics and Finance in its series Economics Series with number 2010_02.

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Date of creation: 03 May 2010
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Handle: RePEc:dkn:econwp:eco_2010_02

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Keywords: Commodity Prices; Unit Root Test; GARCH.;

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Cited by:
  1. Salisu, Afees A. & Mobolaji, Hakeem, 2013. "Modeling returns and volatility transmission between oil price and US–Nigeria exchange rate," Energy Economics, Elsevier, vol. 39(C), pages 169-176.
  2. Vinod Mishra & Russell Smyth, 2014. "Unit root properties of natural gas spot and futures prices: The relevance of heteroskedasticity in high frequency data," Development Research Unit Working Paper Series 20-14, Monash University, Department of Economics.
  3. Westerlund, Joakim, 2013. "Simple unit root testing in generally trending data with an application to precious metal prices in Asia," Journal of Asian Economics, Elsevier, vol. 28(C), pages 12-27.
  4. Jaunky, Vishal Chandr, 2012. "Is there a material Kuznets curve for aluminium? evidence from rich countries," Resources Policy, Elsevier, vol. 37(3), pages 296-307.

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