約翰・哈格爾是麥肯锡公司矽榖辦事處主任以及該公司交互多媒體實踐的領導人。他是暢銷書《網絡利益――通過虛擬社會擴大市場》（哈佛商學院齣版社齣版）的作者之一。

馬剋・辛格是麥肯锡公司舊金山辦事處主任，他在那兒參與領導瞭該公司的連續關係營銷實踐。

Consumers already recognize the need to protect their privacy when using the Internet to communicate, browse for information, and purchase goods and services. With Net Worth, authors Hagel and Singer build an intriguing scenario in which customers take control of their personal data and refuse to surrender it without some compensation. As customers search for the best deal and the safest place for their information assets, an opportunity emerges for firms to leverage new, web-based strategies and act as infomediaries--brokers or intermediaries who help customers maximize the value of their data. Net Worth constructs a new business model around the infomediary, and reveals the coming battle among infomediaries for customers' trust and private information. The authors examine the opportunities the infomediary will present for businesses and consumers alike, as customer-centric brands rise up as the primary source of new value creation, forcing companies to reassess the nature of their core businesses and their long-held beliefs about brands and marketing.