Browsing Department of Economics by Author "Andersson, Kjetil"
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Text and voice : complements, substitutes or both?
Andersson, Kjetil; Foros, Øystein; Steen, Frode (Discussion paper, Working paper, 2005)Text messaging has become an important revenue component for European and Asian mobile operators. We develop a simple model of demand for mobile services incorporating the existence of call externalities and network ...