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Does Price Asymmetry Exist In Commodity and Energy Markets?


  • Wixson, Sarah E.
  • Katchova, Ani L.


Recent increases in the price of crude oil have led to a rise in the prominence of corn-based ethanol as an alternative source of energy. As a result linkages have been established between commodity and energy prices. The aim of this study is to determine if soybeans, corn, wheat, oil, and ethanol adjust their prices asymmetrically depending on whether their actual price is over- or under-predicted with respect to one another. This study’s goal of determining if asymmetric price relationships exist is accomplished by using monthly time series price data incorporated into a distributed lag error correction model distinguishing between positive and negative price difference and positive and negative values of the error correction term. The primary results of this study found that asymmetric price changes do occur in the commodity and energy markets. Interestingly, in all the asymmetric price adjustments that were found, with only one exception in the soybean-corn relationship, prices will adjust downward when the actual price of one variable is above its equilibrium price as determined by the price of another study variable and consequently would be expected to exhibit a downward adjustment in price in the following month.

Suggested Citation

  • Wixson, Sarah E. & Katchova, Ani L., 2011. "Does Price Asymmetry Exist In Commodity and Energy Markets?," 2011 Annual Meeting, July 24-26, 2011, Pittsburgh, Pennsylvania 103735, Agricultural and Applied Economics Association.
  • Handle: RePEc:ags:aaea11:103735

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    References listed on IDEAS

    1. Octavio A. Ramírez, 1997. "Estimation and Use of a Multivariate Parametric Model for Simulating Heteroskedastic, Correlated, Nonnormal Random Variables: The Case of Corn Belt Corn, Soybean, and Wheat Yields," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 79(1), pages 191-205.
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    More about this item


    asymmetric price adjustment; grain prices; crude oil prices; ethanol prices; error correction model; Agribusiness; Agricultural Finance; Demand and Price Analysis; Marketing; Resource /Energy Economics and Policy; Q11; Q13; Q42;

    JEL classification:

    • Q11 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Aggregate Supply and Demand Analysis; Prices
    • Q13 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Markets and Marketing; Cooperatives; Agribusiness
    • Q42 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - Alternative Energy Sources

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