Grajek, Michal; Kretschmer, Tobias - European School of Management and Technology (ESMT) - 2007
We study the dynamics of usage intensity of second-generation cellular telephony over the diffusion curve. Specifically … usage intensity? Second, what is the effect of high penetration of previous generations and competing networks on network … usage intensity? Using an operator-level panel covering 41 countries with quarterly data over 6 years, we find that …