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Are grain markets in Niger driven by speculation?

Author

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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.

Suggested Citation

  • 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://halshs.archives-ouvertes.fr/halshs-00626409v2
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    References listed on IDEAS

    as
    1. John Y. Campbell & Pierre Perron, 1991. "Pitfalls and Opportunities: What Macroeconomists Should Know About Unit Roots," NBER Chapters,in: NBER Macroeconomics Annual 1991, Volume 6, pages 141-220 National Bureau of Economic Research, Inc.
    2. Im, Kyung So & Schmidt, Peter, 2008. "More efficient estimation under non-normality when higher moments do not depend on the regressors, using residual augmented least squares," Journal of Econometrics, Elsevier, vol. 144(1), pages 219-233, May.
    3. Araujo, Claudio & Araujo-Bonjean, Catherine & Brunelin, Stéphanie, 2012. "Alert at Maradi: Preventing Food Crises by Using Price Signals," World Development, Elsevier, vol. 40(9), pages 1882-1894.
    4. Catherine ARAUJO BONJEAN & Claudio ARAUJO & Stephanie BRUNELIN, 2010. "Alert at Maradi: preventing food crisis using price signals," Working Papers 201023, CERDI.
    5. Enders, Walter & Siklos, Pierre L, 2001. "Cointegration and Threshold Adjustment," Journal of Business & Economic Statistics, American Statistical Association, vol. 19(2), pages 166-176, April.
    6. Diba, Behzad T & Grossman, Herschel I, 1988. "Explosive Rational Bubbles in Stock Prices?," American Economic Review, American Economic Association, vol. 78(3), pages 520-530, June.
    7. Behzad T. Diba & Herschel I. Grossman, 1985. "Rational Bubbles in Stock Prices?," NBER Working Papers 1779, National Bureau of Economic Research, Inc.
    8. Blanchard, Olivier Jean, 1979. "Speculative bubbles, crashes and rational expectations," Economics Letters, Elsevier, vol. 3(4), pages 387-389.
    9. Munir Quddus & Charles Becker, 2000. "Speculative Price Bubbles in the Rice Market and the 1974 Bangladesh Famine," Journal of Economic Development, Chung-Ang Unviersity, Department of Economics, vol. 25(2), pages 155-175, December.
    10. Pindyck, Robert S & Rotemberg, Julio J, 1990. "The Excess Co-movement of Commodity Prices," Economic Journal, Royal Economic Society, vol. 100(403), pages 1173-1189, December.
    11. Evans, George W, 1991. "Pitfalls in Testing for Explosive Bubbles in Asset Prices," American Economic Review, American Economic Association, vol. 81(4), pages 922-930, September.
    12. van Norden, Simon, 1996. "Regime Switching as a Test for Exchange Rate Bubbles," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 11(3), pages 219-251, May-June.
    13. Alok Bhargava, 1986. "On the Theory of Testing for Unit Roots in Observed Time Series," Review of Economic Studies, Oxford University Press, vol. 53(3), pages 369-384.
    14. Bohl, Martin T., 2003. "Periodically collapsing bubbles in the US stock market?," International Review of Economics & Finance, Elsevier, vol. 12(3), pages 385-397.
    15. Behzad T. Diba & Herschel I. Grossman, 1987. "On the Inception of Rational Bubbles," The Quarterly Journal of Economics, Oxford University Press, vol. 102(3), pages 697-700.
    16. Hall, Stephen G & Psaradakis, Zacharias & Sola, Martin, 1999. "Detecting Periodically Collapsing Bubbles: A Markov-Switching Unit Root Test," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 14(2), pages 143-154, March-Apr.
    17. van Norden, Simon & Schaller, Huntley, 1993. "The Predictability of Stock Market Regime: Evidence from the Toronto Stock Exchange," The Review of Economics and Statistics, MIT Press, vol. 75(3), pages 505-510, August.
    18. Charemza, Wojciech W. & Deadman, Derek F., 1995. "Speculative bubbles with stochastic explosive roots: The failure of unit root testing," Journal of Empirical Finance, Elsevier, vol. 2(2), pages 153-163, June.
    19. Taylor, Mark P. & Peel, David A., 1998. "Periodically collapsing stock price bubbles: a robust test," Economics Letters, Elsevier, vol. 61(2), pages 221-228, November.
    20. Waters, George A., 2008. "Unit root testing for bubbles: A resurrection?," Economics Letters, Elsevier, vol. 101(3), pages 279-281, December.
    21. James E. Payne & George A. Waters, 2005. "REIT markets: periodically collapsing negative bubbles?," Applied Financial Economics Letters, Taylor and Francis Journals, vol. 1(2), pages 65-69, March.
    22. Enders, Walter & Granger, Clive W J, 1998. "Unit-Root Tests and Asymmetric Adjustment with an Example Using the Term Structure of Interest Rates," Journal of Business & Economic Statistics, American Statistical Association, vol. 16(3), pages 304-311, July.
    23. Ravallion, Martin, 1985. "The Performance of Rice Markets in Bangladesh during the 1974 Famine," Economic Journal, Royal Economic Society, vol. 95(377), pages 15-29, March.
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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;

    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

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