The lead paper in the new issue of the Journal of Wine Economics is a study by Jonathan Reuter arguing that Wine Spectator wine ratings for advertisers were about one point higher than ratings for non-advertisers, when controlled against ratings from Wine Advocate. This is in spite of the magazine’s stated policy of tasting wines completely blind.

This from the abstract:

“In markets for experience goods, publications exist to help consumers decide which products to purchase. However, in most cases these publications accept advertising from the very firms whose products they review, raising the possibility that they bias product reviews to favor advertisers…Although the average Wine Spectator ratings earned by advertisers and non-advertisers are similar, I find that advertisers earn just less than one point higher Wine Spectator ratings than non-advertisers when I use Wine Advocate ratings to adjust for differences in quality.”

These are wine ratings, not the restaurant Awards of Excellence, which I’ve written about in the past (more…)