The Global Wine Score (GWS) is a worldwide rating which assesses wines with a single score, providing comprehensive and comparable information for all industry players.
It is an average adjusted score aggregating the major wine critics. It takes into account their ways of rating and their respective scales to provide an indicator minimizing the experts subjectivity.
Wines from all over the world are getting rated by wine lovers, consumers and wine experts. This system of wine ratings has been helping consumers choose wines to enjoy, store or invest in. The most famous wine critic, Robert Parker, developed a system based on a scale of 100 to score wines depending solely on their quality. This system, very simple to understand, yet complex enough to represent the diversity of wine quality, has been widely used in the wine world.
Traditionnally American wine critics have been using the 100 points scale, Europeans the 20 points scale, while some others have been using the 5 stars scale. Our Global Wine Score is based on the most widely accepted scale (100 points). The Global Wine Score intends to resolve a challenging subject, the objectivity of wine quality, by aggregating the subjectivity of wine experts.
Our score aggregation is determined by a proprietary algorithm based on advanced tools of nonparametric statistics and machine learning developed by our team of data scientists. Our algorithm resolves the following problematics:
Rating scales that differ between wine experts (score over 20 or 100, but also taking into account expert generosity or severity on each rating scale)
Wines rated by different pools of experts (for example, italian wines rated by some critics and australian wines rated by others)
Temporal evolution of wine ratings (from « en primeur » estimation or first tasting to multiple re-ratings)
Global Wine Score combines about a million ratings from wine experts for 100 000 wines (in progress). Some more experts will be added in the coming months, to better serve the wine community. The experts used are the following: