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...

optimization of the exploitation operation is one of the most important issues facing the mining engineers. since several technical and economic parameters depend on the cut-off grade, optimization of this parameter is of particular importance. the aim of this optimization is to maximize the net present value (npv). since the objective function of this problem is non-linear, three methods can b...

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...

Maternal serum screening for Down syndrome involves biochemical tests such as alpha-fetoprotein (alpha FP), human chorionic gonadotrophin (hCG) and unconjugated oestriol (uE3), either alone or in combination, that have variable detection and false-positive rates. Choosing a screening protocol requires a trade-off between a desired detection rate and an acceptable false-positive rate. Selecting ...

Non-technical summary When developing and deploying negative emissions technologies (NETs), little attention has been paid to where. On the one hand, might develop NETs where they are likely contribute most global mitigation targets, contributing a climate solution. other can help support development on regional basis, justified by demands. I defend these arguments suggest that reflect values o...

Whether to legislate to maintain " net neutrality " , the current status quo of prohibiting broadband service providers from charging online websites for preferential access to their residential and commercial customers, has become a subject under fierce debate. We develop a stylized game-theoretic model to address two critical issues of the net neutrality: (1) who are gainers and losers of aba...

A forum is a valuable tool to foster reflection in an in-depth discussion; however, it forces the course mediator to continually pay close attention in order to coordinate learners’ activities. Moreover, monitoring a forum is time consuming given that it is impossible to know in advance when new messages are going to be posted. Additionally, a forum may be inactive for a long period and suddenl...