The most sucsessful effect of Marketing Science is made by Decision Tree . Decision Tree analysis "What kinds of people buy the product". And it tells us a target to sell.
Marketing changed from mass-marketing to segmentation-marketing. Mass-marketing is the way to sell the same production to all people. Segmentation-marketing is the way to sell the people who wants to get the item. The new way prefered to decision tree.
Second suceess is was made by Factor Analysis . It put human minds on scatter plots.