The three promotions differ in effectiveness

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Reference no: EM131096154

Refer to the cracker promotion example on page 926. A student stated, in discussing this case:

"Strictly speaking, you cannot conclude anything about whether the three promotions differ in effectiveness because there was no control. The preceding period does not qualify as a control because it might have differed from the promotion period due to seasonal factors or other unique circumstances." Comment.

Reference no: EM131096154

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