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| Something similar to this is what is incorporated into the model on the blog listed and what is listed as the ''corrected'' model.
Conditions on average decline, to be sure, the model corrects for this expected decline each week, this year the decline is greater but in 2004, the conditions never showed a decline.
The result is that in 2004, the corrected model would show increasing yields despite constant conditions as the normal decline is discarded.
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