Can we explain variations in winery ratings in Victoria?

The scoring of wines and the ratings of wineries is the source of much debate. In this paper we attempt to explain variations in winery ratings in Victoria by examining two winery rating systems, the winery 5-star ratings system of Halliday and the WineBoss version that modifies the Halliday system, to obtain a consensus industry rating from a variety of sources; in conjunction with a limited number of other data about the wineries that are rated. We use ordered logit models and odds ratios on a sample of rated Victorian wineries (291 in the Halliday sample and 331 in the WineBoss sample) to see which predictor variables increase the odds of a winery being in a higher-rated category. Wineries that are older, use a consultant winemaker and/or produce predominantly red wines are more likely to be in a higher-rated category than those wineries that do not; conversely, wineries that use a contract winemaker and/or are located in a number of particular regions of Victoria are more likely to be in a lower-rated category than those wineries that do not. All of these results are as expected and confirm previous research. However, neither the size of the winery in terms of output nor whether the winery has other revenue sources, such as a restaurant, has any significant correlation with winery rating. The paper concludes with some suggestions for further research.