This study investigates the diffusion of mobile telecommunications in Korea. The aim is to compare the performance of logistic model of diffusion with that of a time series autoregressive moving average model and to identify factors that determine the diffusion adoption process. Empirical...

E-mail is an efficient communication tool, but at the same time it is an efficient vehicle for Internet pollution in the form of spam—unsolicited, bulk e-mailings. Spam is a global phenomenon, and debate about possible means of controlling it is lively. Spammers impose a negative externality...