Thede Loder, Marshall W. van Alstyne, Rick Wash. An economic answer to unsolicited communication. In Jack S. Breese, Joan Feigenbaum, Margo I. Seltzer, editors, Proceedings 5th ACM Conference on Electronic Commerce (EC-2004), New York, NY, USA, May 17-20, 2004. pages 40-50, ACM, 2004. [doi]
Abstract is missing.