The Legacy of Gurus: The Impact of Armin Diel and Joel Payne on Winery Ratings in Germany

Bernd Frick

Journal of Wine Economics, 2020, vol. 15, issue 4, 370-377

Abstract: Changes in winery ratings in leading wine guides, that is, improvements as well as deteriorations, are typically attributed to corresponding changes in the quality of the wines produced by the respective winery. What remains unexplored in this context is changes in editorship and/or changes in the composition of the wine tasting teams working for the respective guide. Using data from two particularly prestigious German wine guides (Gault Millau and Vinum), this paper shows that these latter changes have a rather small, yet statistically significant impact on changes in winery ratings. Thus, consumers are well-advised to consider these changes before making their purchasing decision. (JEL Classifications: L21, M30, Q13)

Date: 2020
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