James Surowiecki: The End of Brand Loyalty : The New Yorker: But brands have never been more fragile. The reason is simple: consumers are supremely well informed and far more likely to investigate the real value of products than to rely on logos. “Absolute Value,” a new book by Itamar Simonson, a marketing professor at Stanford, and Emanuel Rosen, a former software executive, shows that, historically, the rise of brands was a response to an information-poor environment. When consumers had to rely on advertisements and their past experience with a company, brands served as proxies for quality; if a car was made by G.M., or a ketchup by Heinz, you assumed that it was pretty good. It was hard to figure out if a new product from an unfamiliar company was reliable or not, so brand loyalty was a way of reducing risk. As recently as the nineteen-eighties, nearly four-fifths of American car buyers stayed loyal to a brand.
Today, consumers can read reams of research about whatever they want to buy.