This empirical study examines productivity changes in Japan and South Korea during 1973–2006 and 1980–2009, respectively, in order to assess how investment in information and communications technology (ICT) affects energy demand. A dynamic factor demand model is applied to link...

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...