1. Information congestion
2. Competition for attention in the Information (overload) Age
3. Hunting: Buffalo”: Elusive spammer sends EarthLink on long chase – EarthLink uses lawyers, private eyes to track sender of online junk – a million e‐mails every day;Angwin J.;Wall Street Journal,2003
4. Arrison S.(2004) ‘Canning spam: an economic solution to unwanted email.' Pacific Research Institute study (available athttp://www.pacificresearch.org/docLib/20070202_2004_Canning_Spam.pdf)
5. Marketing privacy;Ayres I.;Yale Journal on Regulation,2003