Chapters 19, 20, 21, and 22 have been uploaded. Steve -- Associate Professor Division of Policy and Planning Science http://turnbull/sk.tsukuba.ac.jp/ Faculty of Systems and Information Email: turnbull at sk.tsukuba.ac.jp University of Tsukuba Tel: 029-853-5175 Tennodai 1-1-1, Tsukuba 305-8573 JAPAN