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Researchers found that revealing the country and region of origin of the wines from Iowa and Wisconsin had a negative effect on how much participants were willing to pay per bottle. Customers indicated they would be willing to pay an average of $2.70 to $4.80 less per bottle than the designated stated retail price for the wines. For example, if the wine's stated retail price was $24, then the customer would be willing to pay potentially $2.70 to $4.80 less than that price, or $21.30 or $19.20 per bottle. - www.sciencedaily.com