Cognitive radio (CR) is considered a promising technology that could provide important benefits in the telecommunication domain. In Europe, the number of research projects, standardization activities and public consultations by the European Commission and regulatory authorities testify to the...

Network externalities -- the requirement that there be a group of subscribers if communications are to occur -- play a central role in the demand for new networks. And as telecommunications evolve, new networks have increasingly taken attention. In an effort to describe the demand for new...