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How do export controls affect price transmission and volatility spillovers in the Ukrainian wheat and flour markets?

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  • An, Henry
  • Qiu, Feng
  • Zheng, Yanan

Abstract

This study investigates the impact of export controls implemented on Ukrainian wheat during two periods of significant commodity price spikes and volatility. First, we investigate the equilibrium price relationship between wheat and flour prices to identify whether export restrictions dampened the price transmission from the wheat market to the flour market. Second, we estimate an asymmetric VEC-BEKK-GARCH model to characterize the nature of short-run price adjustments and volatility spillovers between the Ukrainian wheat and flour markets. The results indicate that export controls insulated the flour market from price shocks in the wheat market by reducing the transmission elasticity by 25%. We also find evidence that suggests export controls lead to increased volatility in the flour market in the periods immediately before and after the export controls. However, we find no evidence that the export controls increase the time-invariant (i.e., the constant) part of volatility of wheat or flour prices. Lastly, we do not observe asymmetric spillover effects in the flour market but we do find that the wheat market is more volatile when experiencing positive shocks than negative ones.

Suggested Citation

  • An, Henry & Qiu, Feng & Zheng, Yanan, 2016. "How do export controls affect price transmission and volatility spillovers in the Ukrainian wheat and flour markets?," Food Policy, Elsevier, vol. 62(C), pages 142-150.
    • Handle: RePEc:eee:jfpoli:v:62:y:2016:i:c:p:142-150
    DOI: 10.1016/j.foodpol.2016.06.002
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