network effects, increase in the value of consuming a product if many other consumers use the same product, is a feature of many markets of high-technology products. frequently cited examples of products exhibiting network effects are telecommunication or software products. this research explores the role of network effects in the consumer´s choice of mobile operator in tehran. for our empirica...

This paper explores the role of network effects in the consumer’s choice of mobile phone operator in the UK. For our empirical analysis we use two sources of data: market-level data from OFCOM and micro-level data on consumers’ usage of mobile telephones from the survey Home Online. We estimate two classes of models which illustrate the role of network effects. The first is a model of the compa...

Call admission control algorithms that reduce dropped calls in CDMA cellular systems are discussed in this paper. The capacity of a CDMA system is confined by interference of users from both inside and outside of the target cell. Earlier algorithms for call admission control is based on the effective traffic load for the target cell if one call is accepted. These algorithms ignore the interfere...

The differential between on-net and off-net prices, for example on mobile telephony networks, is hotly debated between telecoms operators and regulators. Small operators contend that their competitors’ high off-net prices are anticompetitive. We show that if the utility of receiving calls is taken into account, the equilibrium pricing structures will indeed depend on firms’ market shares. Large...

Isolating test cases from environment dependencies is often desirable, as it increases test reliability and reduces test execution time. However, code that calls non-virtual methods or consumes sealed classes is often impossible to test in isolation. Moles is a new lightweight framework which addresses this problem. For any .NET method, Moles allows test-code to provide alternative implementati...

The new document " Approach on appropriate remedies in the new regulatory framework " (2004) jointly published by ERG and EU, identifies, among several competition problems related to the market of mobile telephony, the strategy of price discrimination between on net and off net calls. Through such strategy the incumbents could get a competitive advantage because the price discrimination can re...

This paper describes Paradis-Net, a typed event-driven message-passing interface for designing distributed systems. Paradis-Net facilitates the development of both peer-to-peer and client-server architectures through a mechanism called “Cooperation”. We introduce the programming interface and compare its mechanisms to active messages and remote procedure calls. Finally we demonstrate how the in...

In this work, we propose a compilation strategy for non-strict functional languages targeting the Microsoft .NET Platform, a multilanguage platform which provides a large number of services to aid current software development. This strategy is based on the push/enter execution model, enables fast function calling mechanisms whenever possible and males use of new features present in .NET Framewo...

Actor-based languages attract attention for their ability to scale to highly parallel architectures. Active objects combine the asynchronous communication of actors with object-oriented programming by means of asynchronous method calls and synchronization on futures. However, the combination of asynchronous calls and synchronization introduces communication cycles which lead to a form of commun...