Marvin A. Sirbu

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The digitization of information goods necessitates a rethinking of their production and distribution economics. An N-good bundling model with multi-dimensional consumer preferences is developed to study the key factors that determine the optimal bundling strategy. Using analytical and empirical methods, mixed bundling is established as the dominant (i.e.(More)
This paper provides a framework for understanding competition and industry structure in the context of Fiber to the Home (FTTH). We present engineering cost models, which indicate that FTTH is a decreasing cost industry, thereby making facilities based competition an unlikely outcome. Non-facilities based competition (or service level competition) in FTTH(More)
A taxonomy of bandwidth types that are, or will likely be, traded in bandwidth exchanges is presented. Bandwidth trading refers to an emerging trend in the telecommunications industry in which varying granularities of bandwidth are traded between buyers, sellers, and brokers in centralized marketplaces. Typical buyers and sellers include telecommunications(More)
This RFC suggests proposed additions to the Internet Mail Protocol, RFC-822, for the Internet community, and requests discussion and suggestions for improvements. Distribution of this memo is unlimited. ABSTRACT A standardized Content-type field allows mail reading systems to automatically identify the type of a structured message body and to process it for(More)
A group of students in the M.S. program in Information Networking at Carnegie Mellon University have designed and implemented a prototype of an Internet Billing Service-an electronic credit card service for the Internet environment. The service provides account management, authentication, access control, credit verification, management reporting, billing(More)
— In some communities, we observe a single vertically integrated FTTP network owner and service provider that can either be profit maximizing or welfare maximizing. In other cases, either out of choice or regulation, we observe the network owner (the wholesaler) leasing facilities to competing service providers (retailers), who then provide voice, video and(More)
'Net Neutrality' is a very heated and contested United States policy principle regarding access for content providers to the Internet end-user, and potential discrimination in that access where the end-user's ISP (or another ISP) blocks that access in part or whole. The suggestion is that the problem can be resolved by either introducing greater(More)
This paper presents an economic analysis the use of an IP-PBX for premises telephony. The analysis estimates the impact of installing an IP-PBX on the cost of premises, local and long distance calling. Results show that an IP-PBX is more expensive than traditional Centrex when only premises telephony costs are considered. This is largely due to the current(More)