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Testing for Speculative Bubbles in Agricultural Commodity Prices: A Regime Switching Approach

  • Liu, Xiaoliang
  • Filler, Gunther
  • Odening, Martin

The sharp increase in agricultural commodity prices in 2008 and in 2011 has triggered an intensive debate on the causes for these price booms. Speculative bubbles have been quoted as one factor among others for the price peaks. Against this background, our paper contributes to this discussion by implementing a novel test procedure for speculative bubbles which has been suggested in the stock market literature. We use a regime switching regression model to test the hypothesis that agricultural prices are driven by periodically collapsing bubbles. The analysis is conducted for wheat, which is one of the most important crops worldwide. Our results show that the data do not support this particular bubbles hypothesis.

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File URL: http://purl.umn.edu/122554
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Paper provided by European Association of Agricultural Economists in its series 123rd Seminar, February 23-24, 2012, Dublin, Ireland with number 122554.

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Date of creation: 23 Feb 2012
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Handle: RePEc:ags:eaa123:122554
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  2. Kenneth D. West, 1986. "A Specification Test for Speculative Bubbles," NBER Working Papers 2067, National Bureau of Economic Research, Inc.
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  8. von Braun, Joachim & Ahmed, Akhter & Asenso-Okyere, Kwadwo & Fan, Shenggen & Gulati, Ashok & Hoddinott, John & Pandya-Lorch, Rajul & Rosegrant, Mark W. & Ruel, Marie & Torero, Maximo & van Rheenen, Te, 2008. "High food prices: The what, who, and how of proposed policy actions," Policy briefs 1A, International Food Policy Research Institute (IFPRI).
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  11. Pindyck, Robert S, 1993. "The Present Value Model of Rational Commodity Pricing," Economic Journal, Royal Economic Society, vol. 103(418), pages 511-30, May.
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  17. Steen Koekebakker & Gudbrand Lien, 2004. "Volatility and Price Jumps in Agricultural Futures Prices—Evidence from Wheat Options," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 86(4), pages 1018-1031.
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  22. von Braun, Joachim & Ahmed, Akhter & Asenso-Okyere, Kwadwo & Fan, Shenggen & Gulati, Ashok & Hoddinott, John & Pandya-Lorch, Rajul & Rosegrant, Mark W. & Ruel, Marie & Torero, Maximo & van Rheenen, Te, 2008. "High food prices: The what, who, and how of proposed policy actions [In Chinese]," Policy briefs 1A CH, International Food Policy Research Institute (IFPRI).
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  26. Markus K. Brunnermeier & Stefan Nagel, 2004. "Hedge Funds and the Technology Bubble," Journal of Finance, American Finance Association, vol. 59(5), pages 2013-2040, October.
  27. Xiaoliang Liu & Wei Xu & Martin Odening, 2011. "Can crop yield risk be globally diversified?," SFB 649 Discussion Papers SFB649DP2011-018, Sonderforschungsbereich 649, Humboldt University, Berlin, Germany.
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