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A test of Bordeaux wine rating services for fine vintages shows that the three most prominent authorities are consistent in their ratings. Thus,
consumers can confidently rely on those ratings if they wish, according to a new wine classification study from Cornell's Center for
Hospitality Research. At the same time, an examination of those modern-day ratings found that the existing French classification of Bordeaux wine
châteaux, developed in 1855, is out of date.
Available
at no charge from the center's website, the study, “An Analysis of Bordeaux Wine Ratings, 1970-2005: Implications for the Existing
Classification of the Médoc and Graves” is written by the Cornell-based team of Gary M. Thompson, Stephen A. Mutkoski, Youngran
Bae, Liliana Ielacqua, and Se Bum Oh. Bae, Ielacqua, and Oh are graduates of the Master of Management in Hospitality program at the Cornell
School of Hotel Administration.
A key conclusion of the authors is that consumers of fine wines can rely on any of the three major wine rating systems – which are Robert
Parker's Wine Advocate, Steven Tanzer's International Wine Cellar, and the Wine Spectator. “Certainly wine purchasers can rely on their own
good judgment, but we found strong congruence among the ratings of these three services throughout the 339 combinations of vintage and
château that we tested,” noted Thompson, who is a professor of operations management at Cornell. “However, because one rater is
consistently higher than the others, consumers should not consider all equally-rated wines as
being equally good, when those ratings are coming from different sources.”
Mutkoski, who is Banfi Vintners Professor of Wine Education and Management, explained that the researchers' findings with regard to
Bordeaux wine classifications for châteaux mean that consumers cannot rely entirely on those rankings. “In preparation for the 1855 World
Exposition, the French established a five-rank classification for the châteaux, and those rankings, known as growths, have remained the
same to this day,” he said. “Based on the wine scores that we analyzed, however, some châteaux have moved up in rank, while others have
faded. While we doubt that the 1855 classification will be revised, market prices for these
producers reflect the new standings. In fact, our findings are a tribute to those producers who have maintained or exceeded their classification in the past 150 years.”
The Bordeaux wine classification study specifies which châteaux have moved up in rank, based on the ratings from Parker, Tanzer, and Wine
Spectator. As a final note for the hospitality industry, the authors point out that
certain wine prices do not correspond perfectly with quality. Thus, sommeliers can – for instance – offer their customers an excellent wine at a relatively modest price.
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