infrastructure segment consists of companies that have products and services that help build the IP-based network infrastructure [Wang et al. 2004]. Such companies include Internet backbone providers such as Qwest, MCI WorldCom to network hardware and software companies such as Cisco, Lucent and 3Com. The second segment consists of Internet Applications. Companies in this segment build and provide products and services that build upon the first segment of Internet infrastructure and make it possible to perform business activities online over the IP network. These companies include Internet commerce application providers such as Netscape, Microsoft, etc., and search-engine vendors like Google. Intermediaries, the third segment of the Internet economy, facilitate the meeting and interaction of buyers and sellers over the Internet by creating Internet real estate where identification, negotiations, and market making activities are carried out for a fee. This segment includes market makers such as online brokerages like eBay, and as well as content
