Zweig gives the example of Palm Pilot IPO shares in March 2000, which the parent company 3Com priced at more than 1,350 times net earnings for the Palm shares. He cites George Akerlof, who writes about identity economics, and points to the fact that users of a product can be so fanatically devoted to it so as to drive up the price for an extended period of time. In the case of Palm Pilot its users were fanatically devoted to the product. This appears to be true for Facebook with users who see their identity enhanced as they put up pictures of themselves and share with friends. Over time users may realize that it is their private information that Facebook is using to generate revenue. It also sets up the shares for a sharper reversal over time.