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Time-Frequency Dynamics of Biofuels-Fuels-Food System

  • Lukas Vacha
  • Karel Janda
  • Ladislav Kristoufek
  • David Zilberman

For the first time, we apply the wavelet coherence methodology on biofuels (ethanol and biodiesel) and a wide range of related commodities (gasoline, diesel, crude oil, corn, wheat, soybeans, sugarcane and rapeseed oil). This way, we are able to investigate dynamics of correlations in time and across scales (frequencies) with a model-free approach. We show that correlations indeed vary in time and across frequencies. We find two highly correlated pairs which are strongly connected at low frequencies - ethanol with corn and biodiesel with German diesel - during almost the whole analyzed period (2003-2011). Structure of correlations remarkably changes during the food crisis - higher frequencies become important for both mentioned pairs. This implies that during stable periods, ethanol is correlated with corn and biodiesel is correlated with German diesel mainly at low frequencies so that they follow a common long-term trend. However, in the crisis periods, ethanol (biodiesel) is lead by corn (German diesel) even at high frequencies (low scales), which implies that the biofuels prices react more rapidly to the changes in their producing factors.

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File URL: http://arxiv.org/pdf/1209.0900
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Paper provided by arXiv.org in its series Papers with number 1209.0900.

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Date of creation: Sep 2012
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Publication status: Published in Energy Economics 40, pp. 233-241, 2013
Handle: RePEc:arx:papers:1209.0900
Contact details of provider: Web page: http://arxiv.org/

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  12. Krätschell, Karoline & Schmidt, Torsten, 2013. "Long-run trends or short-run fluctuations What establishes the correlation between oil and food prices?," Annual Conference 2013 (Duesseldorf): Competition Policy and Regulation in a Global Economic Order 79798, Verein für Socialpolitik / German Economic Association.
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  16. Ladislav Kristoufek & Karel Janda & David zilberman, 2012. "Correlations between biofuels and related commodities: A taxonomy perspective," CAMA Working Papers 2012-29, Centre for Applied Macroeconomic Analysis, Crawford School of Public Policy, The Australian National University.
  17. Kristoufek, Ladislav & Janda, Karel & Zilberman, David, 2012. "Correlations between biofuels and related commodities before and during the food crisis: A taxonomy perspective," Energy Economics, Elsevier, vol. 34(5), pages 1380-1391.
  18. Busse, Stefan & Brümmer, Bernard & Ihle, Rico, 2010. "Interdependencies between fossil fuel and renewable energy markets: the German biodiesel market," DARE Discussion Papers 1010, Georg-August University of Göttingen, Department of Agricultural Economics and Rural Development (DARE).
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