Is the Internet economy synonymous with e-commerce and e-business?

The Internet economy is a broader concept than e-commerce and e-business. It
includes e-commerce and e-business.
The Internet economy pertains to all economic activities using electronic networks
as a medium for commerce or those activities involved in both building the networks
linked to the Internet and the purchase of application services7 such as the
provision of enabling hardware and software and network equipment for Web-based/
online retail and shopping malls (or “e-malls”). It is made up of three major segments:
physical (ICT) infrastructure, business infrastructure, and commerce

The CREC (Center for Research and Electronic Commerce) at the University of Texas
has developed a conceptual framework for how the Internet economy works. The
framework shows four layers of the Internet economy-the three mentioned above and
a fourth called intermediaries