A 2009 study by Sonoma State University found that Sideways slowed the growth in Merlot sales volume and caused its price to fall, but the film's main effect on the wine industry was a rise in the sales volume and price of Pinot Noir and in overall wine consumption [REF].
A 2014 study by Vineyard Financial Associates estimated that Sideways cost Merlot farmers over $400M in lost revenue in the decade after its release [REF].