Global warming, consumer tastes and Old World versus New World philosophy have all played a part in the popularity of certain varietals with vignerons over the past 10 years, according to a study titled “Changing Varietal Distinctiveness of the World’s Wine Regions: Evidence from a New Global Database” by Kym Anderson.
Anderson’s study was published in the latest edition of the “Journal of Wine Economics”. 
“This paper draws on a newly compiled global database to estimate several indicators that capture changes over the first decade of the twenty-first century in the varietal mix of the world’s wine regions,” Anderson wrote.
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