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The supply of maize in the Mexican market depends to a large extent from the US imports which represent a large share of the domestic consumption. Furthermore imports exhibit a seasonal pattern, and peaks are often found close to low levels of domestic production and stocks. The present research suggests that there is a link between imports and prices volatility. Below a threshold value, imports and volatility are not related, but beyond the threshold it is volatility the variable driving imports. From the results one can argue that imports have served as a measure to stabilize prices when the domestic supply is scarce.


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