Brettanomics I: The Cost ofBrettanomycesin California Wine Production

Abstract

Abstract The yeast,Brettanomyces bruxellensis(Brett) is a significant cause of quality defects associated with red wine spoilage. At least some wine producers spend significant resources to prevent, detect, and mitigate damage from Brett, and many express concern about it, but some producers and consumers say they like it in small doses. Brett damage is especially of concern in premium red wine and has become more of a concern to producers in recent years as consumers have become better informed about it. We combine information from diverse sources to develop an initial understanding of the economics ofBrettanomycesand management practices to mitigate its consequences. An analysis of detailed confidential data from three wineries in California reveals that at least some wineries are incurring significant costs to reduce the risk of infection withBrettanomyces. Some other wineries that opt not to spend so much on prevention are incurring higher costs in treating infected wines and in lost value from wines being downgraded to lower-valued blends. Results from an online survey of industry participants reinforce the analysis of the detailed data from the three wineries and suggest that the findings may be indicative of conditions more generally across the industry. (JEL Classifications: D22, D24, L66)

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