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A Simple Model of Endogenous Agricultural Commodity Price Fluctuations with Storage

Author

Listed:
  • Sophie Mitra

    (Fordham University, Department of Economics)

  • Jean-Marc Boussard

    (Académie d'Agriculture de France)

Abstract

A debate has been raging for centuries regarding the effects of inter-annual storage on commodity prices. Most analysts consider storage to function as a price stabilizer, while others place it at the core of an explanation of intriguing features of commodity price series, such as skewed distributions. Most studies have been developed in the context of the theory of competitive storage where random shocks affect supply or demand. Recently, the endogenous chaotic behavior of markets has become another possible hypothesis regarding the origin of commodity price fluctuations. We develop a nonlinear cobweb model with intra- and inter-annual storage, risk averse agents and adaptive expectations. Like the theory of competitive storage, this nonlinear cobweb model with storage can reproduce some of the stylized facts of agricultural commodity prices (autocorrelation of first rank, low kurtosis and skewness). In addition, the effects of storage on price variation are mixed. In the presence of inter-annual storage, chaotic price series show less variation compared to a situation without inter-annual storage but we find that storage contributes to the endogenous volatility of prices by making chaotic dynamics more likely.

Suggested Citation

  • Sophie Mitra & Jean-Marc Boussard, 2011. "A Simple Model of Endogenous Agricultural Commodity Price Fluctuations with Storage," Fordham Economics Discussion Paper Series dp2011-05, Fordham University, Department of Economics.
  • Handle: RePEc:frd:wpaper:dp2011-05
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    References listed on IDEAS

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    Cited by:

    1. Kornher, Lukas & Kalkuhl, Matthias, 0. "Food Price Volatility in Developing Countries and its Determinants," Quarterly Journal of International Agriculture, Humboldt-Universität zu Berlin, vol. 52.
    2. Santeramo, Fabio Gaetano & Lamonaca, Emilia & Contò, Francesco & Stasi, Antonio & Nardone, Gianluca, 2017. "Drivers of grain price volatility: a cursory critical review," MPRA Paper 79427, University Library of Munich, Germany.
    3. Chaudhry, Muhammad Imran & Katchova, Ani & Miranda, Mario Javier, 2016. "Examining pricing mechanics in the poultry value chain - empirical evidence from Pakistan," 2016 Annual Meeting, July 31-August 2, 2016, Boston, Massachusetts 235953, Agricultural and Applied Economics Association.
    4. repec:spr:annopr:v:255:y:2017:i:1:d:10.1007_s10479-015-2066-3 is not listed on IDEAS

    More about this item

    Keywords

    Agricultural Prices; Nonlinear Cobweb Model; Endogenous Fluctuations; Storage;

    JEL classification:

    • Q11 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Aggregate Supply and Demand Analysis; Prices
    • E39 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Other
    • D84 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Expectations; Speculations

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