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Are grain markets in Niger driven by speculation?

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  • Catherine Araujo Bonjean

    (CERDI - Centre d'Études et de Recherches sur le Développement International - UdA - Université d'Auvergne - Clermont-Ferrand I - CNRS - Centre National de la Recherche Scientifique)

  • Catherine Simonet

    (CERDI - Centre d'Études et de Recherches sur le Développement International - UdA - Université d'Auvergne - Clermont-Ferrand I - CNRS - Centre National de la Recherche Scientifique)

Abstract

Over the last two decades, millet prices in Niger have enjoyed periods of spectacular increase during which they seem to go well above their fundamental value. These episodes of price bursts followed by rapid reversals could be attributed to the presence of rational speculative bubbles. Considering millet as a food asset we have developed a pricing model, and tested for the presence of periodically and partially collapsing bubbles for 15 millet markets in Niger. The test strategy consists of estimating the fundamental value of millet and investigating the dynamic properties of price deviations from fundamentals. A battery of unit root tests aimed at controlling for skewness and kurtosis, and for non linearity in the bubble process, is implemented. These tests do not reject the presence of rational bubbles for some of the sample markets, and allow the identification of expanding and collapsing phases in bubble processes. The results show that small markets, located in deficit and remote areas are more prone to speculation than large markets in the main producing and consuming regions.

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  • Catherine Araujo Bonjean & Catherine Simonet, 2012. "Are grain markets in Niger driven by speculation?," Working Papers halshs-00626409, HAL.
    • Handle: RePEc:hal:wpaper:halshs-00626409
    Note: View the original document on HAL open archive server: https://shs.hal.science/halshs-00626409v2
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    Cited by:

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    3. Christophe Muller, 2022. "Poverty Measurement under Income and Price Dispersions," AMSE Working Papers 2204, Aix-Marseille School of Economics, France.
    4. Christophe Muller, 2022. "Poverty Measurement under Income and Price Dispersions," Working Papers hal-03612841, HAL.
    5. Tiia‐Maria Pasanen & Miikka Voutilainen & Jouni Helske & Harri Högmander, 2022. "A Bayesian spatio‐temporal analysis of markets during the Finnish 1860s famine," Journal of the Royal Statistical Society Series C, Royal Statistical Society, vol. 71(5), pages 1282-1302, November.
    6. Nouréini Sayouti & Christophe Muller, 2021. "How does information on minimum and maximum food prices affect measured monetary poverty ? Evidence from Niger," CERDI Working papers hal-03117686, HAL.
    7. Bouali Guesmi & Ahmed Yangui & Ibtissem Taghouti & José Maria Gil, 2022. "Trade-Off between Land Use Pattern and Technical Efficiency Performance: Evidence from Arable Crop Farming in Tunisia," Land, MDPI, vol. 12(1), pages 1-13, December.

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    More about this item

    Keywords

    periodically collapsing bubbles; M-TAR; Markov switching ADF; Residual Augmented ADF test; Rolling ADF test; millet;
    All these keywords.

    JEL classification:

    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
    • O18 - Economic Development, Innovation, Technological Change, and Growth - - Economic Development - - - Urban, Rural, Regional, and Transportation Analysis; Housing; Infrastructure
    • D40 - Microeconomics - - Market Structure, Pricing, and Design - - - General
    • C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes
    • Q18 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Policy; Food Policy; Animal Welfare Policy

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